feat(composer): add color-coded agent selector styling #49

Job	Run time
lint	27s
Rust tests (Linux)	2m 41s
test-js	1m 49s
Rust tests (Windows)	11m 22s
Rust tests (macOS)	1m 9s
typecheck	29s
Tauri build (${{ matrix.platform.name }})	-1s
	17m 56s

Provide feedback