added existing nvim config

vim/.config/nvim/lsp/clangd.lua

@@ -0,0 +1,28 @@
+return {
+  cmd = {
+    'clangd',
+    -- '--clang-tidy',
+    '--background-index',
+    '--offset-encoding=utf-8',
+    '--query-driver=/Users/scie/.platformio/packages/toolchain-xtensa-esp32/**'
+  },
+  filetypes = { 'c', 'cpp', 'objc', 'objcpp', 'cuda', 'proto', 'arduino' },
+  root_markers = {
+    '.clangd',
+    '.clang-tidy',
+    '.clang-format',
+    'compile_commands.json',
+    'compile_flags.txt',
+    'configure.ac' -- AutoTools
+  },
+  single_file_support = true,
+  capabilities = {
+    textDocument = {
+      completion = {
+        editsNearCursor = true,
+      },
+    },
+    offsetEncoding = { 'utf-8', 'utf-16' },
+  },
+}
+