Remove deprecated files and update project structure for GUI application. Deleted .env.example, CLAUDE.md, and main_console.py. Introduced main.py as the new entry point for the GUI application. Updated .gitignore to reflect new file structure and added relevant documentation in README.md.

Author: yixin0829

.env.example

@@ -16,5 +16,9 @@ wheels/
 push_to_talk.log
 push_to_talk_config.json
 
-.claude
-.ruff_cache
+# Claude
+.claude/
+CLAUDE.md
+
+# Ruff
+.ruff_cache/