colony-agent skeleton: worker, dream, birth, status commands (stubs)

Phase 2 crate scaffolded with clap CLI. All commands are stubs
that exit with "not yet implemented". Ready for implementation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Cargo.lock

@@ -290,6 +290,19 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "colony-agent"
+version = "0.1.0"
+dependencies = [
+ "clap",
+ "colony-types",
+ "reqwest",
+ "serde",
+ "serde_json",
+ "tokio",
+ "toml",
+]
+
 [[package]]
 name = "colony-cli"
 version = "0.1.0"