refactor: consolidate CLI command definitions to lib.rs

- Move all CLI command enums (ChannelCommands, SkillCommands, CronCommands, IntegrationCommands, MigrateCommands, ServiceCommands) to lib.rs
- Add clap derives for use in main.rs CLI parsing
- Update all modules to use crate:: prefix instead of super:: for command types
- Add mod util; to main.rs for binary compilation
- Export Config type from lib.rs for main.rs

This refactoring eliminates code duplication between library modules and binary, centralizing all CLI command definitions in one place.

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

src/main.rs

@@ -34,6 +34,7 @@ mod service;
 mod skills;
 mod tools;
 mod tunnel;
+mod util;
 
 use config::Config;