add llms.txt links to footer Resources section (#681)

Author: Oreoxmt

src/shared/resources.ts

@@ -250,6 +250,10 @@ export const EN_FOOTER_ITEMS = [
         name: "Support",
         url: "https://tidb.support.pingcap.com/",
       },
+      {
+        name: "llms.txt",
+        url: "https://docs.pingcap.com/llms.txt",
+      },
     ],
   },
   {
@@ -353,6 +357,10 @@ export const ZH_FOOTER_ITEMS = [
         name: "Education",
         url: "https://learn.pingcap.cn/learner/course",
       },
+      {
+        name: "llms.txt",
+        url: "https://docs.pingcap.com/zh/llms.txt",
+      },
     ],
   },
   {
@@ -449,6 +457,10 @@ export const JA_FOOTER_ITEMS = [
         name: "導入実績",
         url: "https://pingcap.co.jp/usecase/",
       },
+      {
+        name: "llms.txt",
+        url: "https://docs.pingcap.com/ja/llms.txt",
+      },
     ],
   },
   {