add tmux plugin copycat

.tmux/copycat/scripts/stored_search_helpers.sh

@@ -0,0 +1,23 @@
+stored_search_not_defined() {
+	local key="$1"
+	local search_value="$(tmux show-option -gqv "${COPYCAT_VAR_PREFIX}_${key}")"
+	[ -z $search_value ]
+}
+
+stored_search_vars() {
+	tmux show-options -g |
+		\grep -i "^${COPYCAT_VAR_PREFIX}_" |
+		cut -d ' ' -f1 |               # cut just variable names
+		xargs                          # splat var names in one line
+}
+
+# get the search key from the variable name
+get_stored_search_key() {
+	local search_var="$1"
+	echo "$(echo "$search_var" | sed "s/^${COPYCAT_VAR_PREFIX}_//")"
+}
+
+get_stored_search_pattern() {
+	local search_var="$1"
+	echo "$(get_tmux_option "$search_var" "")"
+}