feat: Agent Orchestrator — multi-project agent dashboard

Tauri + Svelte 5 + Rust application for orchestrating multiple AI coding agents.
Includes Claude, Aider, Codex, and Ollama provider support, multi-agent
communication (btmsg/bttask), session anchors, plugin sandbox, FTS5 search,
Landlock sandboxing, and 507 vitest + 110 cargo tests.

.claude/rules/07-documentation.md

@@ -0,0 +1,10 @@
+# Documentation Maintenance
+
+Keep documentation current as development progresses.
+
+## Rules
+
+- Keep `README.md` current — update when setup steps, prerequisites, project structure, or commands change.
+- After significant changes, update root `CLAUDE.md` and `.claude/CLAUDE.md`. Keep both in sync.
+- Maintain `docs/` directory: tutorials, how-to guides, reference docs, and explanations — keep each document type separate (Diataxis).
+- When adding features, add documentation. When removing features, remove documentation.