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/@babel/generator/lib/nodes.js

@@ -0,0 +1,19 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.generatorInfosMap = void 0;
+var generatorFunctions = require("./generators/index.js");
+var deprecatedGeneratorFunctions = require("./generators/deprecated.js");
+const generatorInfosMap = exports.generatorInfosMap = new Map();
+let index = 0;
+for (const key of Object.keys(generatorFunctions).sort()) {
+  if (key.startsWith("_")) continue;
+  generatorInfosMap.set(key, [generatorFunctions[key], index++, undefined]);
+}
+for (const key of Object.keys(deprecatedGeneratorFunctions)) {
+  generatorInfosMap.set(key, [deprecatedGeneratorFunctions[key], index++, undefined]);
+}
+
+//# sourceMappingURL=nodes.js.map