fix: incorrect buffer attach logic

Introduced in previous commit
Fixes #405

Author: AntoineGS

lua/copilot/client.lua

@@ -103,7 +103,12 @@ function M.buf_attach(force)
   local bufnr = vim.api.nvim_get_current_buf()
   local bufname = vim.api.nvim_buf_get_name(bufnr)
 
-  if not force and not M.should_attach(bufnr, bufname) and not util.should_attach() then
+  -- if force or (M.should_attach and M.should_attach(bufnr, bufname)) then
+  -- do stuff
+  -- end
+
+  if not (force or (M.should_attach(bufnr, bufname) and util.should_attach())) then
+    logger.debug("not attaching to buffer based on force and should_attach criteria")
     return
   end