fix: specify branch in git pull command to ensure correct updates

feat: enhance README with GPIO state reporting model and rail boot-state commands

feat: implement GPIO rail boot state management and related commands.

feat: add pin level parsing and boot defaults for GPIO state management (resolves #4)

feat: add hint for meshtastic boot config status in print_mesh_on_boot_status_hint function

feat: refactor meshtastic boot status handling into a dedicated function

Added meshtasticd boot control + status.

fix: remove python3-pip from installation instructions in README.md as it's no longer used at any point since we lean on apt now instead.

chore: remove UNINSTALL.md as it is no longer needed (it's in the wiki's Install docs)

feat(gui): move update section to bottom with divider

feat(gui): add automatic update checking with notifications

fix: remove duplicate function and improve update/measure features

feat(cli): add --check-update command for interactive updates

fix(gui): use install metadata for update detection

Fix --update to work outside git repo using install metadata