refactor(editor): move connector overlay to connector package (#11944)

blocksuite/affine/blocks/surface/src/extensions/index.ts

@@ -4,3 +4,4 @@ export * from './element-renderer';
 export * from './export-manager';
 export * from './legacy-slot-extension';
 export * from './query';
+export * from './surface-middleware';

blocksuite/affine/blocks/surface/src/extensions/query.ts

@@ -1,9 +1,7 @@
-import type { NoteBlockModel } from '@blocksuite/affine-model';
+import type { Connectable, NoteBlockModel } from '@blocksuite/affine-model';
 import type { GfxModel } from '@blocksuite/std/gfx';
 import type { BlockModel } from '@blocksuite/store';
 
-import type { Connectable } from '../managers/connector-manager';
-
 export function isConnectable(
   element: GfxModel | null
 ): element is Connectable {

blocksuite/affine/blocks/surface/src/extensions/surface-middleware.ts

@@ -0,0 +1,23 @@
+import { createIdentifier } from '@blocksuite/global/di';
+import type { ExtensionType } from '@blocksuite/store';
+
+import type { SurfaceBlockModel } from '../surface-model';
+
+export type SurfaceMiddleware = (surface: SurfaceBlockModel) => () => void;
+
+export const surfaceMiddlewareIdentifier = createIdentifier<{
+  middleware: SurfaceMiddleware;
+}>('surface-middleware');
+
+export function surfaceMiddlewareExtension(
+  id: string,
+  middleware: SurfaceMiddleware
+): ExtensionType {
+  return {
+    setup: di => {
+      di.addImpl(surfaceMiddlewareIdentifier(id), {
+        middleware,
+      });
+    },
+  };
+}