feat: implement template search functionality (#2376)

- Added  function to handle template searches based on user input
- Introduced in the TRPC router to facilitate authenticated template
searches
- Updated to include template search results alongside document search
results
- Enhanced query handling by enabling searches only when the input is
valid
- Created corresponding Zod schemas for request and response validation
in

packages/trpc/server/document-router/search-document.types.ts

@@ -1,7 +1,7 @@
 import { z } from 'zod';
 
 export const ZSearchDocumentRequestSchema = z.object({
-  query: z.string(),
+  query: z.string().trim().min(1).max(1024),
 });
 
 export const ZSearchDocumentResponseSchema = z