feat: 添加Font Awesome字体图标及相关样式文件

新增Font Awesome的字体文件、SVG图标及LESS/SCSS样式文件，包括基础样式、图标定义和响应式布局支持。添加了多种常用图标如播放、停止、加减乘除等，并支持列表布局和屏幕阅读器优化。

less/fontawesome.less

@@ -0,0 +1,20 @@
+/*!
+ * Font Awesome Free 6.4.0 by @fontawesome - https://fontawesome.com
+ * License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License)
+ * Copyright 2023 Fonticons, Inc.
+ */
+// Font Awesome core compile (Web Fonts-based)
+// -------------------------
+
+@import "_variables.less";
+@import "_mixins.less";
+@import "_core.less";
+@import "_sizing.less";
+@import "_fixed-width.less";
+@import "_list.less";
+@import "_bordered-pulled.less";
+@import "_animated.less";
+@import "_rotated-flipped.less";
+@import "_stacked.less";
+@import "_icons.less";
+@import "_screen-reader.less";