init: surfaces-bot — Telegram & Matrix prototype

- Surface Protocol: unified IncomingMessage/OutgoingUI/ChatContext
- Telegram: Forum Topics (group + topics per chat)
- Matrix: Space + rooms per chat
- MockPlatformClient with PlatformClient Protocol
- docs: surface-protocol, telegram/matrix specs, api-contract, claude-code-guide
- project scaffold: src/, tests/, pyproject.toml

Co-Authored-By: Claude Sonnet 4-6 <noreply@anthropic.com>

.gitignore

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+# Claude Code — локальные агенты и конфиги
+.claude/
+
+# Secrets
+.env
+
+# Python
+__pycache__/
+*.py[cod]
+*.egg-info/
+.venv/
+dist/
+build/
+
+# Git worktrees (не трекаем в репо)
+.worktrees/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+
+# Tests
+.pytest_cache/
+.coverage
+htmlcov/
+*.DS_Store