tmux: add resurrect to save/restore pane/window layout

.config/tmux/plugins/resurrect/tests/helpers/resurrect_helpers.sh

@@ -0,0 +1,11 @@
+# we want "fixed" dimensions no matter the size of real display
+set_screen_dimensions_helper() {
+	stty cols 200
+	stty rows 50
+}
+
+last_save_file_differs_helper() {
+	local original_file="$1"
+	diff "$original_file" "${HOME}/.tmux/resurrect/last"
+	[ $? -ne 0 ]
+}