feat: swap default behaviour for fail fast

[dnlbauer]

The default behaviour of fail fast is currently to always fail fast.

#42 (comment) discussed that this could be swapped to not fail fast by default. This PR implements this behaviour by changing -nff to -ff for "fail-fast"

I personally feel that this is a more sensible default behaviour for CLI, since users are likely interested in knowing everything that is wrong with their crate.

With this PR, options look like this:

> rocrate-validator validate --help
                                                                                                                                                                                                              
 Usage: rocrate-validator validate [OPTIONS] [ROCRATE_URI]                                                                                                                                                    
                                                                                                                                                                                                              
 rocrate-validator: Validate a RO-Crate against a profile 

╭─ Options ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ --fail-fast                    -ff                                   Fail fast validation mode
(...)
╰────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯

And work as expected:

> rocrate-validator validate -f json -p workflow-run-crate-0.5 .
{
    "meta": {
        "version": "0.1"
    },
    "validation_settings": {
        "profile_identifier": "workflow-run-crate-0.5",
        "enable_profile_inheritance": true,
        "abort_on_first": false,
        "requirement_severity": "REQUIRED",
        "rocrate_validator_version": "0.4.6_26877b5+0-dirty"
    },
    "passed": false,
    "issues": [
        {
            "severity": "REQUIRED",
            "message": "The Main Workflow must refer to its language via programmingLanguage",
            "violatingEntity": "./workflow.yaml",
            "violatingProperty": "http://schema.org/programmingLanguage",
            "violatingPropertyValue": null,
            "check": {
                "identifier": "workflow-ro-crate-1.0_2.2",
                "label": "MUST 2.2",
                "order": 2,
                "name": "Main Workflow language",
                "description": "The Main Workflow must refer to its language via programmingLanguage",
                "severity": "REQUIRED",
                "requirement": {
                    "identifier": "workflow-ro-crate-1.0_2",
                    "name": "Main Workflow definition",
                    "description": "Main Workflow properties defined as MUST",
                    "order": 2,
                    "profile": {
                        "identifier": "workflow-ro-crate-1.0",
                        "uri": "https://w3id.org/workflowhub/workflow-ro-crate/1.0",
                        "name": "Workflow RO-Crate Metadata Specification 1.0",
                        "description": "Workflow RO-Crate Metadata Specification."
                    }
                }
            }
        },
        {
            "severity": "REQUIRED",
            "message": "The Root Data Entity MUST reference a CreativeWork entity with an @id URI that is consistent with the versioned permalink of the Workflow Run Crate profile",
            "violatingEntity": "./",
            "violatingProperty": "http://purl.org/dc/terms/conformsTo",
            "violatingPropertyValue": null,
            "check": {
                "identifier": "workflow-run-crate-0.5_2.1",
                "label": "MUST 2.1",
                "order": 1,
                "name": "Root Data Entity conformsTo",
                "description": "The Root Data Entity MUST reference a CreativeWork entity with an @id URI that is consistent with the versioned permalink of the Workflow Run Crate profile",
                "severity": "REQUIRED",
                "requirement": {
                    "identifier": "workflow-run-crate-0.5_2",
                    "name": "Root Data Entity Metadata",
                    "description": "Properties of the Root Data Entity",
                    "order": 2,
                    "profile": {
                        "identifier": "workflow-run-crate-0.5",
                        "uri": "https://w3id.org/ro/wfrun/workflow/0.5",
                        "name": "Workflow Run Crate 0.5",
                        "description": "Workflow Run Crate Metadata Specification 0.5"
                    }
                }
            }
        }
    ]
}

vs.

> rocrate-validator validate -ff -f json -p workflow-run-crate-0.5 .
{
    "meta": {
        "version": "0.1"
    },
    "validation_settings": {
        "profile_identifier": "workflow-run-crate-0.5",
        "enable_profile_inheritance": true,
        "abort_on_first": true,
        "requirement_severity": "REQUIRED",
        "rocrate_validator_version": "0.4.6_26877b5+0-dirty"
    },
    "passed": false,
    "issues": [
        {
            "severity": "REQUIRED",
            "message": "The Root Data Entity MUST reference a CreativeWork entity with an @id URI that is consistent with the versioned permalink of the Workflow Run Crate profile",
            "violatingEntity": "./",
            "violatingProperty": "http://purl.org/dc/terms/conformsTo",
            "violatingPropertyValue": null,
            "check": {
                "identifier": "workflow-run-crate-0.5_2.1",
                "label": "MUST 2.1",
                "order": 1,
                "name": "Root Data Entity conformsTo",
                "description": "The Root Data Entity MUST reference a CreativeWork entity with an @id URI that is consistent with the versioned permalink of the Workflow Run Crate profile",
                "severity": "REQUIRED",
                "requirement": {
                    "identifier": "workflow-run-crate-0.5_2",
                    "name": "Root Data Entity Metadata",
                    "description": "Properties of the Root Data Entity",
                    "order": 2,
                    "profile": {
                        "identifier": "workflow-run-crate-0.5",
                        "uri": "https://w3id.org/ro/wfrun/workflow/0.5",
                        "name": "Workflow Run Crate 0.5",
                        "description": "Workflow Run Crate Metadata Specification 0.5"
                    }
                }
            }
        }
    ]
}

[kikkomep]

Looks good to me. Thank you @dnlbauer