unix_time and convert_date (#332)

* very simple stuff

* added unix_date and imporved unix_time

* Update docs/scarpet/api/Auxiliary.md

Co-authored-by: gnembon <41132274+gnembon@users.noreply.github.com>

* Update Full.md

* Dont 100% work, but It'll do untl I fix tomorrow

* works, I think

* changeing weekdays

* removing weird stuff I didnt mean to do

* previous commits

* moving to expression.java

because prof.gnembon said

* moving away from LazyFUnctions

cos gnembon doesn't like evaluating somewhere

* updating docs

* tweaks to dates

Co-authored-by: Ghoulboy78 <ghoulboy27@gmail.com>

src/main/java/carpet/script/CarpetExpression.java

@@ -138,6 +138,7 @@ import net.minecraft.world.dimension.DimensionType;
 import net.minecraft.world.gen.ChunkRandom;
 import org.apache.commons.lang3.tuple.Pair;
 
+import java.util.Date;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;