Add configuration files for ESLint, Prettier, set up CI workflow and Husky pre-commit hooks

[samueljd]

Fixes #13

Changelog

ESLint and TypeScript Configuration

• Added plugin:@typescript-eslint/strict for enhanced type checking
• Added eslint-plugin-unused-imports to automatically remove unused imports
• Improved TypeScript error detection with stricter rules:
• no-non-null-assertion: Upgraded to error
• no-explicit-any: Upgraded to error
• no-floating-promises: Upgraded to error
• Added no-unnecessary-condition
• Added prefer-nullish-coalescing and prefer-optional-chain
• Enhanced import organization with additional rules:
  • import/first
  • import/newline-after-import
  • import/no-useless-path-segments
  • import/no-cycle

VS Code Integration

• Enabled automatic removal of unused imports on save
• Configured import organization on save
• Added TypeScript-specific settings:
• Non-relative imports preference
• Single quotes for imports
• Auto-update imports on file move
• Added recommended extensions for improved development

Project Configuration

• Added .nvmrc for Node.js version management (v20.10.0)
• Optimized .gitignore for React/Vite/Tailwind stack
• Enhanced lint-staged to enforce unused import removal in pre-commit
• Added bundle analysis capability with rollup-plugin-visualizer

Developer Experience

• Added caching to ESLint for better performance
• Added separate script commands:
• lint:fix: Fix ESLint issues
• format:check: Verify formatting
• build:analyze: Analyze bundle size