feat(src): add touchpadenable/disable commands

Implemented touchpad control to allow enabling and disabling the touchpad via lapctl.

- New Features
  - Add `touchpad` command with `enable` and `disable` subcommands.
- Enhancements
  - Extend CLI parsing and command routing to support touchpad operations.
- Bug Fixes
  - (none)

src/main.rs

@@ -28,6 +28,7 @@ fn main() {
         Commands::Cooling { command } => commands::cooling::execute(command),
         Commands::Status => commands::status::execute(),
         Commands::InstallRules => commands::install_rules::execute(),
+        Commands::Touchpad { command } => commands::touchpad::execute(command),
         Commands::Inhibit {
             command,
             why,