Add a simple one tool example

Author: slimslenderslacks

prompts/examples/hello_world.md

@@ -0,0 +1,10 @@
+---
+tools:
+  - name: hello-world
+    description: A simple tool that prints "Hello, World!" to the console
+    container:
+      image: busybox:latest
+      command:
+        - echo
+        - "Hello, World!"
+---

src/jsonrpc/server.clj

@@ -91,7 +91,7 @@
                 :total 0
                 :hasMore false}})
 
-(defn entry->prompt-listing [k v m]
+(defn entry->prompt-listing [k v _messages]
   (merge
     {:name (str k)}
     (select-keys (:metadata v) [:description])))