docs: add note on macos 26.4 charge limits

fix: do not try to control magsafe led when magsafe does not exist

docs: add gui by zxw5775

fix: disable charging when batt execution is interrupted by macos

chore: add comment about replacing darwinkit with a fixed one

feat: add `--json` flag to `batt status` for machine-readable output (#122)

fix: direct CLI output to stdout instead of stderr (#121)

docs: add tip for macOS 26.4 on the native charge limit

feat: display different quit tooltip when daemon is not installed

feat: disable calibration when limit is 100

fix: correctly reset MagSafe LED to system state when batt is disabled (limit=100%)

docs: add poweroff faq

docs: add not about quitting batt app

docs: add note about hibernate mode

feat: support setting calibration hold duration and discharge limit