clangd root dir detection with build_nvim

lua/setup/my_lspconfig.lua

@@ -129,6 +129,16 @@ require('lspconfig')['clangd'].setup {
   capabilities = capabilities,
   on_attach = on_attach,
   cmd = { 'clangd', '--compile-commands-dir=build_nvim' },
+  root_dir = require('lspconfig').util.root_pattern(
+    '.clangd',
+    '.clang-tidy',
+    '.clang-format',
+    'compile_commands.json',
+    'compile_flags.txt',
+    'configure.ac',
+    '.git',
+    'build_nvim'
+  )
 }
 -- require('clangd_extensions').setup({
 --   server = {