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/minimatch/dist/esm/escape.d.ts

@@ -0,0 +1,15 @@
+import { MinimatchOptions } from './index.js';
+/**
+ * Escape all magic characters in a glob pattern.
+ *
+ * If the {@link MinimatchOptions.windowsPathsNoEscape}
+ * option is used, then characters are escaped by wrapping in `[]`, because
+ * a magic character wrapped in a character class can only be satisfied by
+ * that exact character.  In this mode, `\` is _not_ escaped, because it is
+ * not interpreted as a magic character, but instead as a path separator.
+ *
+ * If the {@link MinimatchOptions.magicalBraces} option is used,
+ * then braces (`{` and `}`) will be escaped.
+ */
+export declare const escape: (s: string, { windowsPathsNoEscape, magicalBraces, }?: Pick<MinimatchOptions, "windowsPathsNoEscape" | "magicalBraces">) => string;
+//# sourceMappingURL=escape.d.ts.map