[Misc] Update README.md to include relevant links

[torranx]

What are the changes the user will see?

• game-wise none
• gh-wise -> updated readme

Why am I making these changes?

• files under docs directory most esp comments.md, which is relevant for devs/contributors in documenting their code, are not well-known

What are the changes from a developer perspective?

• added a new section ### Documentation which links the project's auto-generated docs, enemy-ai.md, and comments.md
• linked eslint.config.js in #### Linting

Screenshots/Videos

How to test the changes?

Checklist

• I'm using beta as my base branch
• There is no overlap with another PR?
• The PR is self-contained and cannot be split into smaller PRs?
• Have I provided a clear explanation of the changes?
• Have I considered writing automated tests for the issue?
• If I have text, did I make it translatable and add a key in the English locale file(s)?
• Have I tested the changes (manually)?
  • Are all unit tests still passing? (npm run test)
• Are the changes visual?
  • Have I provided screenshots/videos of the changes?