feat: add saraba1st radar rule (#6397)

assets/radar-rules.js

@@ -2447,4 +2447,18 @@
             },
         ],
     },
+    'saraba1st.com': {
+        _name: 'Saraba1st',
+        bbs: [
+            {
+                title: '帖子',
+                docs: 'https://docs.rsshub.app/bbs.html#saraba1st',
+                source: '/2b/:id',
+                target: (params) => {
+                    const id = params.id.includes("thread") ? params.id.split("-")[1] : '';
+                    return id ? `/saraba1st/thread/${id}` : '';
+                },
+            },
+        ],
+    },
 });

docs/bbs.md

@@ -174,7 +174,7 @@ pageClass: routes
 
 ### 帖子
 
-<Route author="zengxs" example="/saraba1st/thread/1789863" path="/saraba1st/thread/:tid" :paramsDesc="['帖子 id']">
+<Route author="zengxs" example="/saraba1st/thread/1789863" path="/saraba1st/thread/:tid" :paramsDesc="['帖子 id']" radar="1">
 
 帖子网址如果为 <https://bbs.saraba1st.com/2b/thread-1789863-1-1.html> 那么帖子 id 就是 `1789863`。