feat: supports functions in bash/js/python/ruby (#6)

rb/may_execute_rb_code.rb

@@ -0,0 +1,22 @@
+def declarate
+  {
+    "name": "may_execute_rb_code",
+    "description": "Runs the ruby code.",
+    "parameters": {
+      "type": "object",
+      "properties": {
+        "code": {
+          "type": "string",
+          "description": "Ruby code to execute, such as `puts \"hello world\"`"
+        }
+      },
+      "required": [
+        "code"
+      ]
+    }
+  }
+end
+
+def execute(data)
+  eval(data["code"])
+end