Add neovim config with some plugins

.config/nvim/lua/config/cmp.lua

@@ -0,0 +1,27 @@
+-- autocompletion
+local cmp = require('cmp')
+cmp.setup({
+  sources = {
+    {name = 'nvim_lsp'},
+  },
+  mapping = cmp.mapping.preset.insert({
+      -- Navigate between completion items
+    ['<C-p>'] = cmp.mapping.select_prev_item({behavior = 'select'}),
+    ['<C-n>'] = cmp.mapping.select_next_item({behavior = 'select'}),
+
+    -- `Enter` key to confirm completion
+    ['<CR>'] = cmp.mapping.confirm({select = false}),
+
+    -- Ctrl+Space to trigger completion menu
+    ['<C-Space>'] = cmp.mapping.complete(),
+
+    -- Scroll up and down in the completion documentation
+    ['<C-u>'] = cmp.mapping.scroll_docs(-4),
+    ['<C-d>'] = cmp.mapping.scroll_docs(4),
+  }),
+  snippet = {
+    expand = function(args)
+      vim.snippet.expand(args.body)
+    end,
+  },
+})