Ensure 'name' is the first column when exporting in dbt format, considering column attributes

[syou6162]

Currently, exporting in dbt format will output the following yaml(datacontract export --format dbt-sources --output datacontract.yml input.yml).

version: 2
sources:
- name: my-data-contract-id
  tables:
  - name: my_product
    description: product table
    columns:
    - data_type: STRING
      description: product id
      tests:
        - not_null
        - unique
      meta:
        ...
      name: product_id

This yaml is valid as dbt yaml, but the column name is the last of the column attributes. Since the column name is the first attribute we want to see, this pull request modifies the column name so that it is the first of the column attributes.

• Tests pass
• ruff format
• README.md updated (if relevant)
•  CHANGELOG.md entry added

[simonharrer]

Good idea! Thanks for your contribution. :-)