feat: basic copilot plugin implement (#6229)

fix CLOUD-25

packages/backend/server/src/plugins/copilot/index.ts

@@ -0,0 +1,18 @@
+import { ServerFeature } from '../../core/config';
+import { Plugin } from '../registry';
+import { assertProvidersConfigs, CopilotProviderService } from './provider';
+
+@Plugin({
+  name: 'copilot',
+  providers: [CopilotProviderService],
+  contributesTo: ServerFeature.Copilot,
+  if: config => {
+    if (config.flavor.graphql) {
+      return assertProvidersConfigs(config);
+    }
+    return false;
+  },
+})
+export class CopilotModule {}
+
+export type { CopilotConfig } from './types';