fix: 修正无法正常读取GraphQL的问题

- 将GraphQL移至server/assets，在构建后会被写入server中
- 在server端通过storage读取数据

server/api/cms/solution/[id].ts

@@ -1,6 +1,5 @@
 import { directus } from '~~/server/utils/directus';
-import { readFileSync } from 'node:fs';
-import path from 'node:path';
+import { loadAssetAsString } from '~~/server/utils/serverAssets';
 
 export default defineEventHandler(async (event) => {
   const id = getRouterParam(event, 'id');
@@ -10,7 +9,13 @@ export default defineEventHandler(async (event) => {
       statusMessage: 'Solution ID is required',
     });
 
-  const query = readFileSync(path.resolve('graphql/solution.graphql'), 'utf-8');
+  const query = await loadAssetAsString(
+    'assets:server',
+    'graphql/solution.graphql'
+  );
+  if (!query)
+    throw createError({ statusCode: 500, message: 'GraphQL query not found' });
+
   const locale = getHeader(event, 'x-locale') || 'zh-CN';
 
   const data = await directus.query<{ solutions_by_id: Solution }>(query, {