chore: proxy image preview in frontend (#11957)

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

- **New Features**
	- Images and icons in bookmark cards are now loaded through an image proxy for improved reliability and consistency.
	- Embed blocks for GitHub, Loom, and YouTube now display banner and creator images via an image proxy service for enhanced image loading.

- **Refactor**
	- Simplified backend URL handling and proxy logic for images, resulting in more efficient processing and reduced complexity.
	- Consolidated image proxy middleware and services into a shared adapter module for streamlined imports and improved maintainability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/blocks/bookmark/src/components/bookmark-card.ts

@@ -1,5 +1,6 @@
 import { getEmbedCardIcons } from '@blocksuite/affine-block-embed';
 import { WebIcon16 } from '@blocksuite/affine-components/icons';
+import { ImageProxyService } from '@blocksuite/affine-shared/adapters';
 import { ThemeProvider } from '@blocksuite/affine-shared/services';
 import { getHostName } from '@blocksuite/affine-shared/utils';
 import { SignalWatcher, WithDisposable } from '@blocksuite/global/lit';
@@ -85,11 +86,12 @@ export class BookmarkCard extends SignalWatcher(
 
     const theme = this.bookmark.std.get(ThemeProvider).theme;
     const { LoadingIcon, EmbedCardBannerIcon } = getEmbedCardIcons(theme);
+    const imageProxyService = this.bookmark.doc.get(ImageProxyService);
 
     const titleIcon = this.loading
       ? LoadingIcon
       : icon
-        ? html`<img src=${icon} alt="icon" />`
+        ? html`<img src=${imageProxyService.buildUrl(icon)} alt="icon" />`
         : WebIcon16;
 
     const descriptionText = this.loading
@@ -102,7 +104,7 @@ export class BookmarkCard extends SignalWatcher(
 
     const bannerImage =
       !this.loading && image
-        ? html`<img src=${image} alt="banner" />`
+        ? html`<img src=${imageProxyService.buildUrl(image)} alt="banner" />`
         : EmbedCardBannerIcon;
 
     return html`