add rust analyzer

lua/configs/cmp.lua

@@ -75,6 +75,7 @@ function M.config()
 				scrolloff = 1,
 			},
 		},
+		preselect = cmp.PreselectMode.None,
 		completion = {
 			keyword_length = 1,
 		},

lua/configs/lspconfig.lua

@@ -137,6 +137,10 @@ function M.config()
 	lspconfig.tsserver.setup({
 		on_attach = on_attach,
 	})
+
+	lspconfig.rust_analyzer.setup({
+		on_attach = on_attach,
+	})
 end
 
 return M