add decache command

install/usr/local/bin/decache

@@ -0,0 +1,8 @@
+#!/bin/bash -ex
+
+# remove gpu related cache files
+rm -rf $HOME/.cache/{Cemu,mesa,radv,citron,eden}*
+
+# remove steam cache
+rm -rf $HOME/.local/share/Steam/steamapps/shadercache/*
+