✨ feat(storage): add shared package types and configuration

Add missing tsconfig.json and source files for @storage/shared package
to fix type-check failures. Includes type definitions for StorageFile,
StorageFolder, FileVersion, Share, Tag, and FileTag interfaces.

apps/storage/packages/shared/src/index.ts

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+export * from './types';

apps/storage/packages/shared/src/types/index.ts

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+export interface StorageFile {
+	id: string;
+	userId: string;
+	name: string;
+	originalName: string;
+	mimeType: string;
+	size: number;
+	storagePath: string;
+	storageKey: string;
+	parentFolderId: string | null;
+	currentVersion: number;
+	isFavorite: boolean;
+	isDeleted: boolean;
+	deletedAt: Date | null;
+	createdAt: Date;
+	updatedAt: Date;
+}
+
+export interface StorageFolder {
+	id: string;
+	userId: string;
+	name: string;
+	description: string | null;
+	parentFolderId: string | null;
+	path: string;
+	depth: number;
+	isFavorite: boolean;
+	isDeleted: boolean;
+	deletedAt: Date | null;
+	createdAt: Date;
+	updatedAt: Date;
+}
+
+export interface FileVersion {
+	id: string;
+	fileId: string;
+	versionNumber: number;
+	storagePath: string;
+	storageKey: string;
+	size: number;
+	comment: string | null;
+	createdBy: string;
+	createdAt: Date;
+}
+
+export interface Share {
+	id: string;
+	userId: string;
+	fileId: string | null;
+	folderId: string | null;
+	shareType: 'file' | 'folder';
+	shareToken: string;
+	accessLevel: 'view' | 'edit' | 'download';
+	password: string | null;
+	maxDownloads: number | null;
+	downloadCount: number;
+	expiresAt: Date | null;
+	createdAt: Date;
+}
+
+export interface Tag {
+	id: string;
+	userId: string;
+	name: string;
+	color: string;
+	createdAt: Date;
+}
+
+export interface FileTag {
+	fileId: string;
+	tagId: string;
+}

apps/storage/packages/shared/tsconfig.json

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+{
+	"compilerOptions": {
+		"target": "ES2022",
+		"module": "ESNext",
+		"moduleResolution": "bundler",
+		"strict": true,
+		"esModuleInterop": true,
+		"skipLibCheck": true,
+		"forceConsistentCasingInFileNames": true,
+		"declaration": true,
+		"declarationMap": true,
+		"noEmit": true
+	},
+	"include": ["src/**/*"],
+	"exclude": ["node_modules"]
+}