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/lodash/gte.js

@@ -0,0 +1,30 @@
+var createRelationalOperation = require('./_createRelationalOperation');
+
+/**
+ * Checks if `value` is greater than or equal to `other`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.9.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if `value` is greater than or equal to
+ *  `other`, else `false`.
+ * @see _.lte
+ * @example
+ *
+ * _.gte(3, 1);
+ * // => true
+ *
+ * _.gte(3, 3);
+ * // => true
+ *
+ * _.gte(1, 3);
+ * // => false
+ */
+var gte = createRelationalOperation(function(value, other) {
+  return value >= other;
+});
+
+module.exports = gte;