print-object method for seq:seq

[garlic0x1]

Solves https://github.com/coalton-lang/coalton/issues/1144

COALTON-USER> (coalton (coalton-library/seq:make 1 2 3))
#.(SEQ 1 2 3)

To avoid the methods defined here being used, I short-circuited them by using an :around method.

Regarding the suggested output #.(seq:make 1 2 3), I replaced seq:make with just seq to match the implementations for Queue and Cell.

There will be nits, I will resolve them tomorrow :)

[garlic0x1]

Now it prints like this:

COALTON-USER> (coalton (coalton-library/seq:make 1 2))
#<SEQ 1 2>

[stylewarning]

squash it all, and i'll merge.

great contribution and sleuthing! thanks!