feat: add chat and file management APIs, implement chat loading and saving functionality

- Introduced new API endpoints for chat management including posting and retrieving chat messages.
- Implemented file upload and deletion functionalities for chat and other files.
- Added utility functions for streaming text and loading chat data.
- Created TypeScript types for models and agents used in the application.
- Configured TypeScript settings for server and project.
- Added favicon and workspace configuration for pnpm.

server/api/files/index.delete.ts

@@ -0,0 +1,12 @@
+import { z } from 'zod'
+import { useValidatedBody } from 'h3-zod'
+
+export default eventHandler(async (event) => {
+  const { pathname } = await useValidatedBody(event, {
+    pathname: z.string()
+  })
+
+  await hubBlob().del(pathname)
+
+  return sendNoContent(event)
+})

server/api/files/index.get.ts

@@ -0,0 +1,3 @@
+export default defineEventHandler(() => {
+  return hubBlob().list()
+})

server/api/files/index.post.ts

@@ -0,0 +1,18 @@
+export default eventHandler(async (event) => {
+  const form = await readFormData(event)
+  const file = form.get('file') as File
+
+  if (!file || !file.size) {
+    throw createError({ statusCode: 400, message: 'No file provided' })
+  }
+
+  ensureBlob(file, {
+    maxSize: '1MB',
+    types: ['image', 'pdf', 'application/pdf']
+  })
+
+  return hubBlob().put(file.name, file, {
+    addRandomSuffix: false,
+    prefix: 'files'
+  })
+})