feat: project scaffold + bridge + maplibre engine

- Vite + Vue 3 + TypeScript strict
- @yuto-water/js-bridge (types, detector, browser provider)
- MapLibre engine (MapManager singleton, MapFactory, LayerFactory)
- Map composables (useMap, useLayer, usePopup)
- Tianditu tile source, 6 layer type factory
- SCSS design tokens (water-blue theme, dark mode)
- Vant 4, maplibre-gl, axios, pinia, echarts deps
- Build passes (vue-tsc + vite)

tsconfig.app.json

@@ -0,0 +1,14 @@
+{
+  "extends": "@vue/tsconfig/tsconfig.dom.json",
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "types": ["vite/client"],
+
+    /* Linting */
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["src/**/*.ts", "src/**/*.tsx", "src/**/*.vue"]
+}