feat: implement mobile reader

- implement mobile epub reader

mobile/metro.config.js

@@ -0,0 +1,25 @@
+const { getDefaultConfig } = require("expo/metro-config");
+const path = require("path");
+
+const projectRoot = __dirname;
+const monorepoRoot = path.resolve(projectRoot, "..");
+
+/**
+ * Expo SDK 52+ configures Metro for Yarn/npm/pnpm workspaces automatically
+ * when using expo/metro-config. This file keeps an explicit monorepo root so
+ * @cloud-reader/shared (packages/shared) resolves reliably in dev and on EAS.
+ *
+ * If you previously added manual watchFolders/nodeModulesPaths and things
+ * work, prefer this minimal config. After changes: npx expo start --clear
+ *
+ * @see https://docs.expo.dev/guides/monorepos/
+ */
+const config = getDefaultConfig(projectRoot);
+
+config.watchFolders = [monorepoRoot];
+config.resolver.nodeModulesPaths = [
+  path.resolve(projectRoot, "node_modules"),
+  path.resolve(monorepoRoot, "node_modules"),
+];
+
+module.exports = config;