feat: add Typer CLI with daemon mode and wtype keyboard injection

Replace argparse CLI with Typer-based CLI supporting `cohere on/off/status`
commands. The daemon runs transcription in the background and types into the
focused Wayland window via wtype. Adds wtype to flake.nix and fixes the
hatchling build backend.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/cohere_transcribe/daemon_main.py

@@ -0,0 +1,8 @@
+import argparse
+
+from .daemon import run_daemon
+
+parser = argparse.ArgumentParser()
+parser.add_argument("--lang", default="en")
+args = parser.parse_args()
+run_daemon(args.lang)