fix(editor): paste when select multiple block texts (#10227)

[BS-2512](https://linear.app/affine-design/issue/BS-2512/选中多段粘贴，多段只有第一段会被replace，这个bug还在)

tests/kit/src/utils/selection.ts

@@ -0,0 +1,55 @@
+import type { RichText } from '@blocksuite/affine-components/rich-text';
+import type { Page } from '@playwright/test';
+
+export async function setSelection(
+  page: Page,
+  anchorBlockId: string,
+  anchorOffset: number,
+  focusBlockId: string,
+  focusOffset: number
+) {
+  await page.evaluate(
+    ({ anchorBlockId, anchorOffset, focusBlockId, focusOffset }) => {
+      const editorHost = document.querySelector('editor-host');
+      if (!editorHost) {
+        throw new Error('Cannot find editor host');
+      }
+
+      const anchorRichText = editorHost.querySelector<RichText>(
+        `[data-block-id="${anchorBlockId}"] rich-text`
+      )!;
+      const anchorRichTextRange = anchorRichText.inlineEditor!.toDomRange({
+        index: anchorOffset,
+        length: 0,
+      })!;
+      const focusRichText = editorHost.querySelector<RichText>(
+        `[data-block-id="${focusBlockId}"] rich-text`
+      )!;
+      const focusRichTextRange = focusRichText.inlineEditor!.toDomRange({
+        index: focusOffset,
+        length: 0,
+      })!;
+
+      const sl = getSelection();
+      if (!sl) throw new Error('Cannot get selection');
+
+      const range = document.createRange();
+      range.setStart(
+        anchorRichTextRange.startContainer,
+        anchorRichTextRange.startOffset
+      );
+      range.setEnd(
+        focusRichTextRange.startContainer,
+        focusRichTextRange.startOffset
+      );
+      sl.removeAllRanges();
+      sl.addRange(range);
+    },
+    {
+      anchorBlockId,
+      anchorOffset,
+      focusBlockId,
+      focusOffset,
+    }
+  );
+}