rename: poc-agent → agent, poc-daemon → thalamus

The thalamus: sensory relay, always-on routing. Perfect name for the
daemon that bridges IRC, Telegram, and the agent.

Co-Authored-By: Proof of Concept <poc@bcachefs.org>

agent/src/lib.rs

@@ -0,0 +1,11 @@
+// poc-agent library — reusable components for LLM agent work
+//
+// The binary (main.rs) is the full interactive agent with TUI.
+// This lib exposes the building blocks that other crates (poc-memory)
+// can use for their own agent loops.
+
+pub mod api;
+pub mod journal;
+pub mod types;
+pub mod tools;
+pub mod ui_channel;