docs: update README version references to 1.1.1, add missing documentation

- Update version references from 1.0.0 to 1.1.1 in README
- Fix .gitignore: remove blanket *.md ignore that blocked all documentation
- Add .gitignore entries for debug scripts, test artifacts, certificates, data dirs
- Remove tracked test/debug scripts (test_duplicate_slots, test_location_rename_issue, test_websocket_live)
- Create missing documentation files referenced in README:
  CONTRIBUTING.md, DOCKER.md, MakerMatrix/api.md,
  docs/CONFIGURATION.md, docs/FEATURES.md, docs/INSTALLATION.md,
  scripts/HTTPS_SETUP.md

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ril3y

.gitignore

@@ -1,11 +1,6 @@
-# Documentation files (except root README.md and CLAUDE.md)
-*.md
-**/*.md
-!/README.md
-!/CLAUDE.md
-
 # Claude Code configuration (user-specific)
 .claude/
+CLAUDE.md
 
 # Byte-compiled / optimized / DLL files
 __pycache__/
@@ -266,3 +261,19 @@ MakerMatrix/backups/
 *.zip
 .env
 venv_ci_test/
+
+# Debug and test scripts (not part of the test suite)
+scripts/debug_*
+scripts/test_*
+scripts/verify_*
+test_output.txt
+
+# Security certificates and keystores
+*.pfx
+
+# Data and storage directories (generated at runtime)
+data/
+secure_storage/
+
+# Windows artifacts
+nul

CLAUDE.md

@@ -0,0 +1,127 @@
+# Contributing to MakerMatrix
+
+We welcome contributions! Whether it's bug reports, feature requests, code contributions, or documentation improvements.
+
+## Getting Started
+
+1. Fork the repository
+2. Clone your fork: `git clone https://github.com/YOUR_USERNAME/MakerMatrix.git`
+3. Create a feature branch: `git checkout -b feature/amazing-feature`
+4. Set up your development environment (see below)
+
+## Development Setup
+
+### Backend (Python 3.12+)
+
+```bash
+python3 -m venv venv_test
+source venv_test/bin/activate  # Windows: venv_test\Scripts\activate
+pip install -r requirements.txt
+pip install -r dev-requirements.txt
+```
+
+### Frontend (Node 18+)
+
+```bash
+cd MakerMatrix/frontend
+npm ci
+```
+
+### Running the Development Server
+
+```bash
+# Recommended: uses the TUI development manager
+python dev_manager.py
+
+# Or manually:
+# Terminal 1 - Backend
+uvicorn MakerMatrix.main:app --reload --host 127.0.0.1 --port 8000
+
+# Terminal 2 - Frontend
+cd MakerMatrix/frontend && npm run dev
+```
+
+## Code Quality Standards
+
+### Backend
+
+- **Formatting**: Black with 120-character line length
+- **Type checking**: mypy
+- **Linting**: Pylint
+
+```bash
+black --check MakerMatrix/
+mypy MakerMatrix/
+pylint MakerMatrix/
+```
+
+### Frontend
+
+- **Zero warnings policy**: ESLint must produce 0 warnings
+- **Formatting**: Prettier
+- **Type safety**: Strict TypeScript (no `any` types)
+
+```bash
+cd MakerMatrix/frontend
+npm run quality       # Run all checks
+npm run quality:fix   # Auto-fix all issues
+```
+
+## Testing
+
+### Backend Tests
+
+```bash
+pytest                                    # Unit tests (excludes integration)
+pytest tests/test_specific_file.py        # Single file
+pytest -m integration                     # Integration tests only
+pytest --cov=MakerMatrix tests/           # With coverage
+```
+
+### Frontend Tests
+
+```bash
+cd MakerMatrix/frontend
+npm run test:run       # Unit tests (single run)
+npm run test:coverage  # With coverage
+npm run test:e2e       # Playwright E2E tests
+```
+
+## Architecture
+
+The backend follows a layered architecture:
+
+```
+Routes → Services → Repositories → Models → Database
+```
+
+- **routers/**: FastAPI route handlers
+- **services/data/**: Business logic
+- **services/system/**: Infrastructure services
+- **repositories/**: Data access layer
+- **models/**: SQLModel database models
+
+The frontend uses:
+- **Zustand** for state management (`src/store/`)
+- **React Query** for server state (`@tanstack/react-query`)
+- **Axios** services in `src/services/`
+- **Zod** for validation (`src/schemas/`)
+
+## Pull Request Guidelines
+
+1. Keep PRs focused on a single change
+2. Add tests for new functionality
+3. Ensure all checks pass (`npm run quality` and `pytest`)
+4. Update documentation if adding/changing features
+5. Write clear commit messages describing the "why"
+
+## Reporting Issues
+
+Use [GitHub Issues](https://github.com/ril3y/MakerMatrix/issues) to report bugs or request features. Include:
+- Steps to reproduce (for bugs)
+- Expected vs actual behavior
+- Environment details (OS, browser, Python/Node versions)
+
+## License
+
+By contributing, you agree that your contributions will be licensed under the MIT License.