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/generator-function/CHANGELOG.md

@@ -0,0 +1,27 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [v2.0.1](https://github.com/TimothyGu/generator-function/compare/v2.0.0...v2.0.1) - 2025-09-30
+
+### Commits
+
+- [meta] fix repo URL [`f5d05f2`](https://github.com/TimothyGu/generator-function/commit/f5d05f278e1f0660c418bf0b867e0013873da48c)
+
+## [v2.0.0](https://github.com/TimothyGu/generator-function/compare/v1.0.0...v2.0.0) - 2025-09-29
+
+### Commits
+
+- Initial reimplementation, tests, readme, types [`e5940de`](https://github.com/TimothyGu/generator-function/commit/e5940de4328fc70ad27aa4bab4245f6c9ce62a44)
+- [meta] remove unused files [`460bbe9`](https://github.com/TimothyGu/generator-function/commit/460bbe9cc6c89f9fdab05a001dc924308124613b)
+- [Dev Deps] add missing peer dep [`b873c0d`](https://github.com/TimothyGu/generator-function/commit/b873c0dad8f38b08e2acc4bd5204a90dde0fe051)
+- [meta] fix FUNDING.yml [`9ae9d43`](https://github.com/TimothyGu/generator-function/commit/9ae9d432a0c06d698e1aeb20b1161ca8a08b3cbb)
+
+## v1.0.0 - 2015-10-10
+
+### Commits
+
+- Initial commit [`176e0cd`](https://github.com/TimothyGu/generator-function/commit/176e0cd3a5ebb004aa666c6eecbe5a968efbddf9)