fix(logging): remove hard-coded version from banner

Remove hard-coded "v1.1.0" so the CLI banner prints "Geeto" without a
static version. This prevents stale version numbers in output and removes
the need to update the banner on each release; the version can be sourced
from package metadata in a follow-up change.

Author: rust142

src/utils/logging.ts

@@ -71,7 +71,7 @@ export const log = {
   spinner: () => new Spinner(),
   banner: () => {
     console.log(
-      `${colors.cyan}${colors.bright}Geeto v1.1.0${colors.reset} ${colors.gray}— AI-Powered Git Workflow Automation${colors.reset}`
+      `${colors.cyan}${colors.bright}Geeto${colors.reset} ${colors.gray}— AI-Powered Git Workflow Automation${colors.reset}`
     )
   },
 } as const