feat(gateway): add MCP server endpoint with streamable HTTP transport (#137)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/gateway/src/app.module.ts

@@ -15,6 +15,7 @@ import { MemoryModule } from './memory/memory.module.js';
 import { LogModule } from './log/log.module.js';
 import { SkillsModule } from './skills/skills.module.js';
 import { PluginModule } from './plugin/plugin.module.js';
+import { McpModule } from './mcp/mcp.module.js';
 import { ThrottlerGuard, ThrottlerModule } from '@nestjs/throttler';
 
 @Module({
@@ -34,6 +35,7 @@ import { ThrottlerGuard, ThrottlerModule } from '@nestjs/throttler';
     LogModule,
     SkillsModule,
     PluginModule,
+    McpModule,
   ],
   controllers: [HealthController],
   providers: [