Add progressive web app companion for cross-platform access

Vite + TypeScript PWA that mirrors the Android app's core features:
- Pre-processed shelter data (build-time UTM33N→WGS84 conversion)
- Leaflet map with shelter markers, user location, and offline tiles
- Canvas compass arrow (ported from DirectionArrowView.kt)
- IndexedDB shelter cache with 7-day staleness check
- Service worker with CacheFirst tiles and precached app shell
- i18n for en, nb, nn (ported from Android strings.xml)
- iOS/Android compass handling with low-pass filter
- Respects user map interaction (no auto-snap on pan/zoom)
- Build revision cache-breaker for reliable SW updates

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pwa/node_modules/get-own-enumerable-property-symbols/CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
+
+### [3.0.2](https://github.com/mightyiam/get-own-enumerable-property-symbols/compare/v3.0.1...v3.0.2) (2019-12-10)
+
+
+### Bug Fixes
+
+* add missing license file ([dbf11c2](https://github.com/mightyiam/get-own-enumerable-property-symbols/commit/dbf11c2b705dcfb42d6ac291f6608adb14ed6fd3)), closes [#87](https://github.com/mightyiam/get-own-enumerable-property-symbols/issues/87)
+
+### [3.0.1](https://github.com/mightyiam/get-own-enumerable-property-symbols/compare/v3.0.0...v3.0.1) (2019-10-04)