feat: V1 prototype — Vite/React/TS tileset generator

- Scaffold: package.json, tsconfig.json, vite.config.ts, index.html
- src/lib/imageProcessor.ts: full pipeline (normalize, offset, seam repair, export, validation)
- src/components/UploadPanel.tsx: drag-and-drop, file picker, clipboard paste
- src/components/SettingsPanel.tsx: all controls per spec
- src/components/PreviewPanel.tsx: Original / Tileable / Repeated tabs
- src/components/ErrorBanner.tsx: dismissible error/warning banners
- src/App.tsx: root component wiring everything together
- src/index.css: dark premium glassmorphism theme w/ Inter font

node_modules/json5/lib/parse.d.ts

@@ -0,0 +1,15 @@
+/**
+ * Parses a JSON5 string, constructing the JavaScript value or object described
+ * by the string.
+ * @template T The type of the return value.
+ * @param text The string to parse as JSON5.
+ * @param reviver A function that prescribes how the value originally produced
+ * by parsing is transformed before being returned.
+ * @returns The JavaScript value converted from the JSON5 string.
+ */
+declare function parse<T = any>(
+    text: string,
+    reviver?: ((this: any, key: string, value: any) => any) | null,
+): T
+
+export = parse