feat(core): Add Prettier formatting and markdownlint checks to output + project-wide lint cleanup

[siddjellali]

This PR introduces several quality-of-life improvements and linting enhancements for the prisma-markdown project:

✅ Formatted the generated Markdown output using Prettier
Ensures consistent and readable output formatting when generating documentation.

🧪 Added a pre-commit hook configuration (.pre-commit-config.yaml)
Uses markdownlint to validate the generated output during pre-commit to catch issues like broken links or spacing problems early.

🧹 Linted the entire codebase
Cleaned up formatting and consistency issues across the project, including test files.

🔧 Additional Notes:
The Prettier formatting is applied directly at the end of the Markdown generation pipeline.

The pre-commit setup requires pre-commit to be installed locally (pip install pre-commit or brew install pre-commit).

[siddjellali]

why did you rollback ?

[samchon]

The rollback files are just package.json and invalid styled ts files fixed by prettier --write command.

[samchon]

Using prettier is careful, because it sometimes breaks table content.

I changed the code to write markdown content with prettier applied as much as possible.

[samchon]

If you still need prettier to markdown content, please do it manually after generation.