refactor(editor): move transcription block model to ai (#12010)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

- **Refactor**
	- Updated and reorganized import paths for transcription block models and types to improve module structure and maintainability.
- **Chores**
	- Removed deprecated transcription block schema and related exports from core libraries.
	- Registered transcription block schema directly within the workspace schema for improved schema management.
- **Bug Fixes**
	- Ensured consistent registration and availability of transcription block features across relevant modules.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/model/src/blocks/index.ts

@@ -15,4 +15,3 @@ export * from './paragraph/index.js';
 export * from './root/index.js';
 export * from './surface-ref/index.js';
 export * from './table';
-export * from './transcription';

blocksuite/affine/model/src/blocks/transcription/index.ts

@@ -1 +0,0 @@
-export * from './transcription-model.js';

blocksuite/affine/model/src/blocks/transcription/transcription-model.ts

@@ -1,37 +0,0 @@
-import {
-  BlockModel,
-  BlockSchemaExtension,
-  defineBlockSchema,
-} from '@blocksuite/store';
-
-export const TranscriptionBlockFlavour = 'affine:transcription';
-
-const defaultProps: TranscriptionBlockProps = {
-  transcription: {},
-  jobId: undefined,
-  createdBy: undefined, // the user id of the creator
-};
-
-export const TranscriptionBlockSchema = defineBlockSchema({
-  flavour: TranscriptionBlockFlavour,
-  props: () => defaultProps,
-  metadata: {
-    version: 1,
-    role: 'attachment-viewer',
-    parent: ['affine:attachment'],
-    children: ['affine:callout'],
-  },
-  toModel: () => new TranscriptionBlockModel(),
-});
-
-export type TranscriptionBlockProps = {
-  transcription: Record<string, any>;
-  jobId?: string;
-  createdBy?: string;
-};
-
-export class TranscriptionBlockModel extends BlockModel<TranscriptionBlockProps> {}
-
-export const TranscriptionBlockSchemaExtension = BlockSchemaExtension(
-  TranscriptionBlockSchema
-);