Chat Modes -> Agents (#433)

* Migrating chat modes to agents now that's been released to stable

* Fixing collections

* Fixing names of agents

* Formatting

* name too long

* Escaping C# agent name

collections/java-mcp-development.collection.yml

@@ -1,14 +1,24 @@
 id: java-mcp-development
 name: Java MCP Server Development
-description: 'Complete toolkit for building Model Context Protocol servers in Java using the official MCP Java SDK with reactive streams and Spring Boot integration.'
-tags: [java, mcp, model-context-protocol, server-development, sdk, reactive-streams, spring-boot, reactor]
+description: "Complete toolkit for building Model Context Protocol servers in Java using the official MCP Java SDK with reactive streams and Spring Boot integration."
+tags:
+  [
+    java,
+    mcp,
+    model-context-protocol,
+    server-development,
+    sdk,
+    reactive-streams,
+    spring-boot,
+    reactor,
+  ]
 items:
   - path: instructions/java-mcp-server.instructions.md
     kind: instruction
   - path: prompts/java-mcp-server-generator.prompt.md
     kind: prompt
-  - path: chatmodes/java-mcp-expert.chatmode.md
-    kind: chat-mode
+  - path: agents/java-mcp-expert.agent.md
+    kind: agent
     usage: |
       recommended