123PeriodicTimer v1.1.0

123PeriodicTimer v1.1.0 adds a proper main menu with Start Timer, Settings, and About; improves branding and SEO copy across the project; and updates the Flipper app metadata for better discoverability.\n\nChanges in this release:\n- New main menu flow: Start Timer, Settings, About\n- Dedicated About screen inside the app\n- 123PeriodicTimer branding in app UI and manifest\n- Improved README SEO text and GitHub repository topics\n- Version bump to 1.1.0\n\nInstall:\n- Download periodic_timer.fap from this release\n- Copy it to SD Card/apps/Tools/ on your Flipper Zero\n- Launch 123PeriodicTimer from Applications -> Tools