feat(editor): show doc title in page block (#9975)

Close [BS-2392](https://linear.app/affine-design/issue/BS-2392/page-block-需要显示文章title)

### What Changes
- Add `<doc-title>` to edgeless page block (a.k.a the first page visible note block)
- Refactors:
  - Move `<doc-title>` to `@blocksuite/affine-component`, but you can aslo import it from `@blocksuite/preset`
  - Extract `<edgeless-note-mask>` and `<edgeless-note-background>` from `<affine-edgeless-note>` to a seperate file
  - Rewrite styles of `<affine-edgeless-note>` with `@vanilla-extract/css`

https://github.com/user-attachments/assets/a0c03239-803e-4bfa-b30e-33b919213b12

blocksuite/affine/block-note/src/components/edgeless-note-background.css.ts

@@ -0,0 +1,27 @@
+import { cssVar } from '@toeverything/theme';
+import { style } from '@vanilla-extract/css';
+
+import {
+  ACTIVE_NOTE_EXTRA_PADDING,
+  edgelessNoteContainer,
+} from '../note-edgeless-block.css';
+
+export const background = style({
+  position: 'absolute',
+  borderColor: cssVar('black10'),
+  left: 0,
+  top: 0,
+  width: '100%',
+  height: '100%',
+
+  selectors: {
+    [`${edgelessNoteContainer}[data-editing="true"] &`]: {
+      left: `${-ACTIVE_NOTE_EXTRA_PADDING}px`,
+      top: `${-ACTIVE_NOTE_EXTRA_PADDING}px`,
+      width: `calc(100% + ${ACTIVE_NOTE_EXTRA_PADDING * 2}px)`,
+      height: `calc(100% + ${ACTIVE_NOTE_EXTRA_PADDING * 2}px)`,
+      transition: 'left 0.3s, top 0.3s, width 0.3s, height 0.3s',
+      boxShadow: cssVar('activeShadow'),
+    },
+  },
+});