feat(identity): Register tool(#31)

Author: S0okJu

src/openstack_mcp_server/tools/identity_tools.py

@@ -19,6 +19,9 @@ def register_tools(self, mcp: FastMCP):
         mcp.tool()(self.create_region)
         mcp.tool()(self.delete_region)
         mcp.tool()(self.update_region)
+        
+        mcp.tool()(self.get_domains)
+        mcp.tool()(self.get_domain)
 
     def get_regions(self) -> list[Region]:
         """