feat(guild): add guild and channel list APIs for frontend browser

Fabric.Backend.Guild/src/guilds/guilds.controller.ts

@@ -1,9 +1,17 @@
-import { Body, Controller, Post } from '@nestjs/common';
+import { Body, Controller, Get, Post } from '@nestjs/common';
+import { GuildsService } from './guilds.service';
 
 @Controller('guilds')
 export class GuildsController {
+  constructor(private readonly guildsService: GuildsService) {}
+
+  @Get()
+  list() {
+    return this.guildsService.list();
+  }
+
   @Post()
   create(@Body() body: Record<string, unknown>) {
-    return { status: 'todo', action: 'create-guild', received: body };
+    return this.guildsService.create(body);
   }
 }