revert back to old diagnostic float window

lua/plugins/lspconfig.lua

@@ -123,6 +123,7 @@ return {
       vim.keymap.set('n', '<A-o>', '<cmd>ClangdSwitchSourceHeader<CR>',
         { noremap = true, silent = false, desc = 'Switch Source/Header', buffer = bufnr })
 
+      vim.cmd([[autocmd CursorHold <buffer> lua OpenDiagFloat()]])
 
       -- Set some keybinds conditional on server capabilities
       if client.server_capabilities.documentFormattingProvider then