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/rollup/dist/loadConfigFile.js

@@ -0,0 +1,29 @@
+/*
+  @license
+	Rollup.js v4.59.0
+	Sun, 22 Feb 2026 07:31:53 GMT - commit ae846957f109690a866cc3e4c073613c338d3476
+
+	https://github.com/rollup/rollup
+
+	Released under the MIT License.
+*/
+'use strict';
+
+Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
+
+require('node:fs/promises');
+require('node:path');
+require('node:process');
+require('node:url');
+require('./shared/rollup.js');
+require('./shared/parseAst.js');
+const loadConfigFile_js = require('./shared/loadConfigFile.js');
+require('path');
+require('./native.js');
+require('node:perf_hooks');
+require('./getLogFilter.js');
+
+
+
+exports.loadConfigFile = loadConfigFile_js.loadConfigFile;
+//# sourceMappingURL=loadConfigFile.js.map