feat(about): add team member profile page

This commit introduces a new section to showcase team members, starting with the founder's profile.

- Adds a dynamic page route `/about/` to display individual member profiles.
- Creates a new `about` content collection to source profile information from Markdown files.
- Adds the first profile for 'Xiaomai', including a detailed resume and background image.
- Integrates a 'Teams' dropdown into the main navigation header.
- Implements a `copyToClipboard` utility with a toast notification for sharing profile links.

i18n/locales/zh-CN/common.json

@@ -51,6 +51,15 @@
             "description": "我们工作室创始人小麦的博客网站。"
           }
         }
+      },
+      "teams": {
+        "label": "团队",
+        "children": {
+          "xiaomai": {
+            "label": "小麦",
+            "description": "Tootaio Studio 创始人 - 全栈开发者"
+          }
+        }
       }
     },
     "button": {