Add clean script

Signed-off-by: Severin Kaderli <severin@kaderli.dev>

system/.local/bin/clean

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+# 
+# SCRIPT NAME:
+# clean
+#
+# AUTHOR:
+# Severin Kaderli <severin@kaderli.dev>
+#
+# DESCRIPTION:
+# This script cleans the system.
+#
+# USAGE:
+# ./clean
+. utils
+
+print_section "Remove unneeded dependencies"
+yay -R $(yay -Qdtq)
+
+print_section "Clean yay cache"
+yay -Sc
+
+print_section "Clean docker"
+docker system prune