refactor(component): refactor the implementation of Button and IconButton (#7716)

## Button
- Remove props withoutHoverStyle
   refactor hover impl with independent layer, so that hover-color won't affect the background even if is overridden outside
- Update `type` (renamed to `variant`):
  - remove `processing` and `warning`
  - rename `default` with `secondary`
- Remove `shape` props
- Remove `icon` and `iconPosition`, replaced with `prefix: ReactNode` and `suffix: ReactNode`
- Integrate tooltip for more convenient usage
- New Storybook document
- Focus style

## IconButton
- A Wrapper base on `<Button />`
- Override Button size and variant
  - size: `'12' | '14' | '16' | '20' | '24' | number`
     These presets size are referenced from the design system.
  - variant:  `'plain' | 'solid' | 'danger' | 'custom'`
- Inset icon via Button 's prefix

## Fix
- fix some button related issues
- close AF-1159, AF-1160, AF-1161, AF-1162, AF-1163, AF-1158, AF-1157

## Storybook

![CleanShot 2024-08-03 at 14.57.20@2x.png](https://graphite-user-uploaded-assets-prod.s3.amazonaws.com/LakojjjzZNf6ogjOVwKE/f5a76110-35d0-4082-a940-efc12bed87b0.png)

packages/frontend/component/src/components/import-page/index.tsx

@@ -16,6 +16,9 @@ import {
   importPageContainerStyle,
 } from './index.css';
 
+/**
+ * @deprecated Not used
+ */
 export const ImportPage = ({
   importMarkdown,
   importHtml,
@@ -37,8 +40,9 @@ export const ImportPage = ({
       onClick={() => {
         onClose();
       }}
-      icon={<CloseIcon />}
-    />
+    >
+      <CloseIcon />
+    </IconButton>
     <div className={importPageBodyStyle}>
       <div className="title">Import</div>
       <span>