chore(editor): adjust min width of edgeless note (#10153)

Close [BS-2499](https://linear.app/affine-design/issue/BS-2499/所有notes最小宽度调整为218px)

### What changes
- adjusted min width of edgeless note
  - placeholder show ellipsis in min edgeless note
- refactored somes button of `change-note-button.ts` with `isPageBlock`

blocksuite/affine/block-paragraph/src/styles.ts

@@ -126,6 +126,10 @@ export const paragraphBlockStyles = css`
   .affine-paragraph-placeholder {
     position: absolute;
     display: none;
+    max-width: 100%;
+    overflow-x: hidden;
+    white-space: nowrap;
+    text-overflow: ellipsis;
     left: 0;
     bottom: 0;
     pointer-events: none;