Add tmux package and common dotfiles deployment

dotfiles/common/.tmux/plugins/tpm/scripts/helpers/utility.sh

@@ -0,0 +1,17 @@
+ensure_tpm_path_exists() {
+	mkdir -p "$(tpm_path)"
+}
+
+fail_helper() {
+	local message="$1"
+	echo "$message" >&2
+	FAIL="true"
+}
+
+exit_value_helper() {
+	if [ "$FAIL" == "true" ]; then
+		exit 1
+	else
+		exit 0
+	fi
+}