fix(copilotchat): limit function names to 64 characters (#243)

Add a safeguard in `create_function_name` to ensure generated function names do not exceed 64 characters. This prevents potential issues with overly long function names when registering MCP tools and resources as CopilotChat functions.

Author: Racle

lua/mcphub/extensions/copilotchat/functions.lua

@@ -36,6 +36,11 @@ local function create_function_name(server_name, item_name, opts)
         name = "mcp_" .. name
     end
 
+    -- Limit the name to 64 characters
+    if #name > 64 then
+      name = name:sub(1, 64)
+    end
+
     return name
 end