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.

src-tauri/src/pty.rs

@@ -0,0 +1,4 @@
+// Thin wrapper — re-exports bterminal_core::pty types.
+// PtyManager is now in bterminal-core; this module only re-exports for lib.rs.
+
+pub use bterminal_core::pty::{PtyManager, PtyOptions};