chore: add copilot instructions

Author: Sviatoslav Zhovtiak

.github/copilot-instructions.md

@@ -0,0 +1,62 @@
+# GitHub Copilot Instructions
+
+You are working on a **React Starter Boilerplate** project - a modern, production-ready React application foundation built by The Software House.
+
+## Project Overview
+
+This is a carefully crafted React starter template featuring:
+- **Vite** for fast development and building
+- **TypeScript** for type safety
+- **TanStack Router** for type-safe routing
+- **TanStack Query** with custom abstraction layer
+- **React Intl** for internationalization
+- **Vitest** for unit testing
+- **Playwright** for E2E testing
+- **Plop** for code generation
+- **MSW** for API mocking
+
+## Key Architecture Principles
+
+1. **Type Safety First**: All code should be fully typed with TypeScript
+2. **Custom Abstractions**: Use project-specific abstractions (especially for API calls)
+3. **Code Generation**: Prefer using Plop generators for creating new components/features
+4. **Testing**: Write tests for all new functionality
+5. **Documentation**: Keep docs updated when adding new patterns
+
+## Specialized Instructions
+
+For detailed guidance on specific areas, refer to these specialized instruction files:
+
+- **[API Development](instructions/api.instructions.md)** - API patterns, React Query usage, data fetching
+- **[Frontend Development](instructions/frontend.instructions.md)** - Component patterns, hooks, UI development
+- **[State Management](instructions/state.instructions.md)** - Context patterns, global state management
+- **[E2E Testing](instructions/e2e.instructions.md)** - End-to-end testing patterns and best practices
+
+## Quick Reference
+
+### Project Structure
+```
+src/
+├── api/          # API layer with custom abstractions
+├── routes/       # TanStack Router pages and components
+├── hooks/        # Custom hooks (flat structure)
+├── ui/           # Reusable UI components (flat structure)
+├── context/      # Global contexts with controllers
+├── utils/        # Utility functions
+├── types/        # Global type definitions
+└── i18n/         # Internationalization setup
+```
+
+### Common Commands
+- Generate components: `npm run plop`
+- Run tests: `npm test`
+- Run E2E: `npm run e2e:open`
+- Start dev server: `npm start`
+
+## General Guidelines
+
+1. **Always use existing patterns** - Check `/docs/` for project-specific patterns
+2. **Generate don't write** - Use Plop generators when available
+3. **Follow naming conventions** - camelCase for files, PascalCase for components
+4. **Import from correct locations** - Use project's custom hooks, not library directly
+5. **Write tests** - Every new component/hook should have tests