feat(cssVar): add new CSS variables for font size and tooltip positioning

Refactor styles for consistency and improved theming

- Updated context menu styles to use new spacing and surface mixins.
- Adjusted control styles to utilize touch hit size for better accessibility.
- Refined info panel padding and applied panel surface mixin for uniformity.
- Standardized mini player transitions and background colors.
- Introduced new mixins for panel surfaces and flyout animations.
- Enhanced notice padding and applied consistent spacing variables.
- Updated plugin styles to use new icon sizes and panel surface mixin.
- Improved progress bar styles with consistent surface and shadow properties.
- Refactored selector styles to utilize new surface mixin and flyout animations.
- Streamlined setting panel styles with consistent spacing and hover effects.
- Added new variables for spacing, surface colors, and icon sizes.
- Updated volume panel styles to use new spacing and flyout animations.

feat(cssVar): add new CSS variables for enhanced theming and layout

Refactor styles in ArtPlayer

- Updated transition properties across various LESS files to use the new `--art-ease-standard` variable for consistency.
- Added new CSS variables for mobile padding and border radius.
- Introduced shadow variables for different elevation levels.
- Minor adjustments to ensure proper formatting and consistency in LESS files, including adding missing newlines at the end of files.

refactor: replace art-text-muted mixin with direct font-size in setting.less

Refactor styles for context menu, info panel, and settings

- Updated font sizes to use the new variable `--art-font-size-sm` for consistency across context menus, info panels, and settings.
- Introduced a new mixin `.art-menu-item-base` to standardize menu item styles, including padding and hover effects.
- Adjusted padding and positioning for tooltip elements in the progress bar.
- Added new CSS variables for tip padding and offset to enhance maintainability and readability of styles.

packages/artplayer/src/style/fullscreenWeb.less

@@ -1,4 +1,4 @@
 .art-fullscreen-web {
     .art-fullscreen();
     .art-full(var(--art-fullscreen-web-index), fixed);
-}
+}