chore: remove eslint, prettier, tslint and replace with biome

[0xSero]

Relates to

Migrating from ESLint/Prettier to Biome

Risks

Low - Code style and linting changes only. No functional changes.
Low - The lint fixes will be progressive i have turned off a lot of default errors existing in biome but not eslint, we can turn them on one by one later, and deal with the changes

Background

What does this PR do?

• Removes ESLint and Prettier configurations and dependencies
• Adds Biome for unified linting and formatting
• Updates CI workflow to use Biome
• Updates scripts to use Biome commands

What kind of change is this?

Updates (replacing existing linting and formatting tools with Biome)

Documentation changes needed?

My changes require a change to the project documentation:

• Update development setup instructions to mention Biome instead of ESLint/Prettier
• Update contributing guidelines with new formatting commands

Testing

Where should a reviewer start?

1. Review the new biome.json configuration
2. Check the updated CI workflow
3. Verify package.json changes (removed old dependencies, added Biome)

Detailed testing steps

1. Clone the branch
2. Run pnpm install
3. Run pnpm check to verify Biome works
4. Make some code changes and verify formatting works with pnpm format
5. Run the test suite to ensure nothing was broken

Files Changed

• Added biome.json
• Updated .github/workflows/ci.yaml
• Updated root package.json
• Removed ESLint/Prettier configs:
  • Deleted .eslintrc.* files
  • Deleted .prettierrc.* files
  • Deleted eslint.config.* files

Deploy Notes

No special deployment steps needed. Changes are development-tooling only.

Discord username

0xSero

[JoeyKhd]

I have an outstanding branch that also leverages Lefthook so that at least formatting runs whenever one tries to create a commit.

https://github.com/JoeyKhd/eliza/tree/biome-lefthook

Have not managed to finish it up entirely. But one of the things that I see here in your PR that is has not updated the defaultFormatters across the board.

[0xSero]

I have an outstanding branch that also leverages Lefthook so that at least formatting runs whenever one tries to create a commit.

https://github.com/JoeyKhd/eliza/tree/biome-lefthook

Have not managed to finish it up entirely. But one of the things that I see here in your PR that is has not updated the defaultFormatters across the board.

I am hoping to do this in a phased approach, it's a very big pr as is.

[twilwa]

will go ahead and approve but didn't go through all changes; running pnpm check comes up with a few warnings but does run successfully. LGTM tho