Replace ESLint with oxlint for significantly faster linting performance

[Copilot]

This PR switches the project from ESLint to oxlint, a Rust-based linter that provides dramatically faster performance while maintaining compatibility with most ESLint rules.

Performance Improvements

• Linting speed: ~2ms (extremely fast) vs previous ESLint setup
• Rule coverage: 127 active rules across TypeScript, React, Unicorn, and OXC plugins
• Multi-threaded: 4-threaded execution for optimal performance

Changes Made

Dependencies

• Removed: eslint, @eslint/js, eslint-plugin-react-hooks, eslint-plugin-react-refresh, typescript-eslint, globals
• Added: oxlint v1.12.0 in root devDependencies for monorepo consistency

Configuration

• Created .oxlintrc.json at package root for centralized monorepo configuration
• Configured plugins for:
  • TypeScript: TypeScript-specific linting rules
  • React: React best practices and JSX rules
  • Unicorn: Additional code quality rules
  • OXC: Unique optimization rules from the OXC project
• Configured react/react-in-jsx-scope: off for modern React with new JSX transform
• Added dist to ignore patterns

Scripts & Workflow

• Centralized lint command: Moved from dashboard-specific to root workspace command oxlint .
• Simplified configuration: oxlint automatically picks up .oxlintrc.json from root
• Removed: dashboard-specific lint script and config path references
• All existing workflow commands (pnpm lint, pnpm build) work unchanged

Documentation

• Updated README files to reflect the switch to oxlint
• Added performance metrics and configuration guidance
• Removed outdated ESLint configuration examples

Validation

✅ All lint rules pass with 0 warnings/errors
✅ Build process works unchanged
✅ Development server starts normally
✅ Error detection confirmed (tested with intentional code issues)
✅ Centralized configuration works across monorepo
✅ Root workspace linting command functional

The switch maintains all existing code quality standards while providing significantly faster feedback during development and proper monorepo organization with centralized commands.

Fixes #17.

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[Boshen]

@copilot move apps/dashboard/.oxlintrc.json to the package root, along with relevant commands.

[Copilot]

@copilot move apps/dashboard/.oxlintrc.json to the package root, along with relevant commands.

Done! I've moved .oxlintrc.json to the package root and updated the relevant commands:

• Configuration: Moved apps/dashboard/.oxlintrc.json → .oxlintrc.json (root)
• Dependencies: Moved oxlint from dashboard to root devDependencies for monorepo consistency
• Commands: Updated dashboard lint script to reference root config: oxlint --config ../../.oxlintrc.json .
• Verification: Confirmed linting works from both root (pnpm lint) and dashboard directory

The change maintains the same fast performance (2ms, 127 rules, 4 threads) while centralizing configuration for the monorepo. Commit: ab3e8cf

[Boshen]

@copilot move this command to package root as workspace command.

[Copilot]

Done! I've moved the lint command to the package root as a workspace command:

• Root package.json: Changed from "lint": "pnpm -r lint" to "lint": "oxlint ."
• Dashboard package.json: Removed the dashboard-specific lint script
• Simplified: oxlint automatically picks up .oxlintrc.json from root, no config path needed

All commands work unchanged (pnpm lint, pnpm build, pnpm build-deploy) with the same fast performance. Commit: cd1a110