Crash on missing .leet.toml file

[c-git]

Describe the bug

If .leet.toml is missing the program crashes.

Leetcode problem

Not related to a specific problem

To Reproduce

Do not have a .leet.toml and try to generate a module

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Error Message

Error: failed to load config

Caused by:
    0: failed to read .leet.toml
    1: No such file or directory (os error 2)

Expected behavior

Missing file is ignored or a warning is issued but not crash and just create new file on save.

Environment Info:

• Cargo Version: N/A

Additional context