Using Fdb

Uses fdb (Flutter Debug Bridge) CLI to interact with running Flutter apps on devices and simulators. Launches or attaches to apps, hot reloads, screenshots, reads app logs (`fdb logs`) and native system logs (`fdb syslog` — Android logcat, iOS syslog, macOS log), fetches OS-level crash records (`fdb crash-report` — jetsam, LMK, native .ips), inspects widget trees, describes screens including off-screen GridView/ListView children, taps/inputs/scrolls/swipes/navigates, forces garbage collection (`fdb gc`), and grants/revokes/resets runtime permissions (`fdb grant-permission`). Use when launching or attaching to a Flutter app on device (including apps started outside fdb via…