Add docs for arcade-java and Spring AI guide (#903)

* Add docs for arcade-java and Spring AI guide

* Fix broken link, missing Tabs.Tab wrapper, and comment typo

- Change /guides/security to /guides/user-facing-agents/secure-auth-production in Spring AI guide
- Add missing <Tabs.Tab> wrapper around Java code block in call-tool-agent quickstart
- Fix copy-paste comment from "Go Client" to "Java Client" in references page

Made-with: Cursor

* 🤖 Regenerate LLMs.txt

---------

Co-authored-by: Brian Demers <Brian.Demers@gmail.com>
Co-authored-by: Valerie Fanelle <valeriefanelle@mac.local.meter>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: 4 people

app/_components/agent-framework-tabs.tsx

@@ -3,7 +3,10 @@ import { PlatformCard } from "@/app/_components/platform-card";
 
 export function AgentFrameworkTabs() {
   return (
-    <Tabs items={["Python", "JavaScript"]} storageKey="preferredLanguage">
+    <Tabs
+      items={["Python", "JavaScript", "Java"]}
+      storageKey="preferredLanguage"
+    >
       <Tabs.Tab>
         <div className="mt-6 grid gap-3 sm:grid-cols-2 sm:gap-4 md:gap-5 lg:grid-cols-3">
           <PlatformCard
@@ -83,6 +86,16 @@ export function AgentFrameworkTabs() {
           />
         </div>
       </Tabs.Tab>
+      <Tabs.Tab>
+        <div className="mt-6 grid gap-3 sm:grid-cols-2 sm:gap-4 md:gap-5 lg:grid-cols-3">
+          <PlatformCard
+            icon="/images/icons/spring-ai.svg"
+            link="/en/get-started/agent-frameworks/springai"
+            name="Spring AI"
+            type="Agent Framework"
+          />
+        </div>
+      </Tabs.Tab>
     </Tabs>
   );
 }

app/en/get-started/agent-frameworks/_meta.tsx

@@ -31,6 +31,9 @@ export const meta: MetaRecord = {
   vercelai: {
     title: "Vercel AI SDK",
   },
+  springai: {
+    title: "Spring AI SDK",
+  },
 };
 
 export default meta;