Add command to pprint-eval-and-replace

[trueneu]

Add command to eval sexp, pretty-print the result and replace the sexp with the result.

It may come in handy should the CIDER user need to define a large datastructure to debug their code, and change it slightly later.

The behaviour is the same as cider-eval-print-last-sexp with optional argument, but with additional replacing the original sexp.

NOTE:

• I haven't found tests related to printing, apologies if I missed them.
• I feel there is refactoring potential here since I just copy-pasted the function essentially, but my elsip-fu is too weak to carry it out ATM.

Closes #3822

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Thanks!

If you're just starting out to hack on CIDER you might find this section of its
manual extremely useful.

[trueneu]

Scratch this, @rrudakov was kind enough to point out cider-format-edn-last-sexp.