rewrite nvim config to lua

Signed-off-by: Lucas Sta Maria <lucas.stamaria@gmail.com>

.config/nvim/lua/completion.lua

@@ -0,0 +1,31 @@
+-- nvim-cmp
+local cmp = require("cmp")
+
+cmp.setup {
+    completion = {
+        autocomplete = false
+    },
+    snippet = {
+        expand = function(args)
+            require("luasnip").lsp_expand(args.body)
+        end,
+    },
+    mapping = {
+        ['<C-b>'] = cmp.mapping(cmp.mapping.scroll_docs(-4), { 'i', 'c' }),
+        ['<C-f>'] = cmp.mapping(cmp.mapping.scroll_docs(4), { 'i', 'c' }),
+        ['<C-Space>'] = cmp.mapping(cmp.mapping.complete(), { 'i', 'c' }),
+        ['<C-y>'] = cmp.config.disable, -- Specify `cmp.config.disable` if you want to remove the default `<C-y>` mapping.
+        ['<C-e>'] = cmp.mapping({
+            i = cmp.mapping.abort(),
+            c = cmp.mapping.close(),
+        }),
+        ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+    },
+    sources = cmp.config.sources {
+        { name = "nvim_lsp" },
+        { name = "nvim_lua" },
+        { name = "luasnip" },
+        { name = "buffer" },
+        { name = "path" }
+    }
+}