Rename and add sorting words

Rename and add sorting words

sorting:
natural-sort → sort
sort → sort-with
sort-with → sort-by
+ inv-sort
+ inv-sort-with
inv-sort-with → inv-sort-by
+ inv-sort-keys
+ inv-sort-values

sorting.slots → sorting.specification:
compare-slots → compare-with-spec
sort-by → sort-with-spec
sort-by-with → sort-with-spec-by
sort-keys-by → sort-keys-with-spec
sort-values-by → sort-values-with-spec

sorting.quick:
natural-sort! → sort!
sort! → sort-with!
sort-with! → sort-by!
+ inv-sort!
+ inv-sort-with!
inv-sort-with! → inv-sort-by!

sorting.bubble:
natural-bubble-sort! → bubble-sort!
bubble-sort! → bubble-sort-with!