Pre-commit update for Windows

[alexander-zap]

Proposed change(s)

This change introduces explicit fixed to make development with pre-commit suitable for Windows.

This includes:

• Manual conversion to CRLF in mixed-line-ending hook (and addition of more file endings to be ignored)
• Generating markdown explicitly with "\r\n" as new lines
• Minor mypy fix in one file

Useful links (Github issues, JIRA tickets, ML-Agents forum threads etc.)

Types of change(s)

• [ X ] Bug fix
• New feature
• Code refactor
• Breaking change
• Documentation update
• Other (please describe)

Checklist

• Added tests that prove my fix is effective or that my feature works
• Updated the changelog (if applicable)
• Updated the documentation (if applicable)
• Updated the migration guide (if applicable)

Other comments

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