chore: add git hooks, ESLint/Prettier, and commitlint

[andrefelizardo]

• Add Husky-based git hooks: pre-commit runs pnpm lint-staged and commit-msg runs pnpm commitlint --edit "$1" for conventional commits.
• Configure lint-staged for auto-fix DX: run eslint --fix then prettier --write on staged TS/JS files and prettier --write on staged markdown.
• Introduce shared lint/format tooling: add root .eslintrc.cjs, .eslintignore, prettier.config.cjs, .prettierignore and wire @oaknetwork/api scripts (lint, lint:fix, format, typecheck).
• Tighten CI checks: add a CI commitlint job and a pnpm typecheck step in build-and-test to run tsc --noEmit in workspaces.
• Docs: update README.md to describe git hooks, ESLint/Prettier usage, pnpm typecheck, and the CI enforcement flow.

Test plan

• pnpm install
• pnpm lint
• pnpm typecheck
• pnpm test
• Make a small change, stage it, and run git commit:
  • Verify ESLint/Prettier auto-fix staged files.
  • Verify bad commit messages are rejected and valid conventional commits pass.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Include test files in typed ESLint project

The ESLint config restricts parserOptions.project to packages/api/tsconfig.build.json, but that tsconfig excludes __tests__ while packages/api/package.json now lints __tests__/**/*.{ts,tsx}. Because plugin:@typescript-eslint/recommended-requiring-type-checking is enabled, ESLint will raise parsing errors for those test files not being in the configured TS project, so pnpm lint and the CI lint step will fail until tests are covered by a referenced tsconfig (or removed from the lint target).

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[chatgpt-codex-connector]

Stop lint-staged from ESLinting contracts with API tsconfig

This pre-commit rule runs eslint --fix for staged files under packages/contracts, but the only configured TypeScript project for ESLint is ./packages/api/tsconfig.build.json in .eslintrc.cjs. Staging any contracts .ts file will therefore trigger the TypeScript-ESLint "file was not found in any of the provided projects" parsing failure, blocking commits that modify the contracts package.

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