refactor(editor): rename block-std to std (#11250)

Closes: BS-2946

blocksuite/framework/std/src/selection/block.ts

@@ -0,0 +1,33 @@
+import { BaseSelection, SelectionExtension } from '@blocksuite/store';
+import z from 'zod';
+
+const BlockSelectionSchema = z.object({
+  blockId: z.string(),
+});
+
+export class BlockSelection extends BaseSelection {
+  static override group = 'note';
+
+  static override type = 'block';
+
+  static override fromJSON(json: Record<string, unknown>): BlockSelection {
+    const result = BlockSelectionSchema.parse(json);
+    return new BlockSelection(result);
+  }
+
+  override equals(other: BaseSelection): boolean {
+    if (other instanceof BlockSelection) {
+      return this.blockId === other.blockId;
+    }
+    return false;
+  }
+
+  override toJSON(): Record<string, unknown> {
+    return {
+      type: 'block',
+      blockId: this.blockId,
+    };
+  }
+}
+
+export const BlockSelectionExtension = SelectionExtension(BlockSelection);