feat: scaffold luggage list expo app with core local MVP

TODO.md

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+# TODO - Luggage List
+
+## In Progress
+- [x] Bootstrap project from `/root/projects/time-until`
+- [x] Set app metadata to Luggage List
+- [x] Add first MVP implementation shell
+
+## MVP Feature Checklist
+- [x] Local-only storage (no auth/no backend)
+- [x] Trip creation/selection with active trip auto-selection
+- [x] Trip image support
+- [x] Luggage items CRUD with category
+- [x] Item statuses: packed, unpacked, lost, left-behind, lent-to (+ person name)
+- [x] Item placement tracking: suitcase, backpack, with-user, other
+- [x] Item image support
+- [x] Create check-up snapshots
+- [x] Check-up history per trip
+- [x] JSON export
+- [x] Default luggage list template (copy into new trip)
+
+## Remaining
+- [ ] Adjust CI/CD workflow naming and artifact naming for this project
+- [ ] Validate app builds (web export smoke check)
+- [ ] Polish README and commit final notes