Close [BS-1869](https://linear.app/affine-design/issue/BS-1869/[bug]-android-chrome-%E8%BE%93%E5%85%A5%E9%94%99%E8%AF%AF)
## Problem
On Android devices, keyboard events do not properly capture key information, causing the backspace key and other keyboard functionalities to malfunction. This is due to the specific behavior of Android platform, as discussed in:
- https://stackoverflow.com/a/68188679
- https://stackoverflow.com/a/66724830
## Solution
1. Added special handling for Android platform in `KeyboardControl` class by using `beforeInput` event instead of `keyDown` event
2. Implemented `androidBindKeymapPatch` function to handle special key events on Android platform
3. Updated event handling logic in related components, including:
- CodeBlock
- ListKeymap
- ParagraphKeymap
- PageKeyboardManager
## Changes
- Added `androidBindKeymapPatch` function for handling key events on Android platform
- Modified `KeyboardControl.bindHotkey` method to add `beforeInput` event handling for Android
- Unified event object access using `ctx.get('defaultState').event` instead of `keyboardState.raw`
- Updated key event handling logic in multiple components
## Before
https://github.com/user-attachments/assets/e8602de4-d584-4adf-816f-369f38312022
## After
https://github.com/user-attachments/assets/f9e1680e-28ff-4d52-bdab-7683cdcb6f82
### TL;DR
Moved image proxy middleware and adapter extensions to their respective packages and introduced a new spec provider for adapter registration.
### What changed?
- Relocated `defaultImageProxyMiddleware` from blocks to `@blocksuite/affine-block-image`
- Moved `PresentTool` from fragment-frame-panel to block-frame
- Created new adapter extension specs for HTML, Markdown, and Notion HTML
- Introduced a spec provider pattern for adapter registration
- Removed direct transformer references from RootService
- Updated imports across affected files to use new locations
### How to test?
1. Verify image proxy functionality works in exports and imports
2. Test HTML, Markdown, and Notion HTML adapters still function correctly
3. Confirm presentation mode works with the relocated PresentTool
4. Check that all file import/export operations continue to work as expected
### Why make this change?
This reorganization improves code modularity by placing features in their logical packages and introduces a more maintainable pattern for adapter registration. The spec provider pattern makes it easier to manage and extend adapter functionality while reducing coupling between components.
