feat(ui): change borders

lua/config/plugins/neotree.lua

@@ -1,11 +1,19 @@
 require("neo-tree").setup({
 	close_if_last_window = false,
-	popup_border_style = "rounded",
 	enable_git_status = true,
 	enable_diagnostics = true,
+	source_selector = {
+		separator = { left = "", right = "" },
+		separator_active = false,
+		show_separator_on_edge = false,
+	},
+	popup_border_style = "NC",
 	open_files_do_not_replace_types = { "terminal", "trouble", "qf" },
 	sort_case_insensitive = false,
 	sort_function = nil,
+	window = {
+		separator_position = "left",
+	},
 	default_component_configs = {
 		diagnostics = {
 			symbols = {