Add support for pretty printing values in the inspector.

[r0man]

This is the CIDER part of pretty printing values in the Inspector. The changes to Orchard and cider-nrepl are here:

• Pretty view mode orchard#335
• Add support for pretty printing values in the inspector. cider-nrepl#932

You can now toggle the pretty printing of values in the inspector with the P key and customize their initial presentation by adjusting the cider-inspector-pretty-print customization option.

The data structure shown on the following pictures was this:

{{:a 0
  :bb "000"
  :ccc []
  :d [{:a 0 :bb "000" :ccc []}
      {:a -1 :bb "111" :ccc [1]}
      {:a -2 :bb "222" :ccc [2 1]}
      {:a -3 :bb "333" :ccc [3 2 1]}
      {:a -4 :bb "444" :ccc [4 3 2 1]}]}
 {:a -1
  :bb "111"
  :ccc [1]
  :d [{:a 0 :bb "000" :ccc []}
      {:a -1 :bb "111" :ccc [1]}
      {:a -2 :bb "222" :ccc [2 1]}
      {:a -3 :bb "333" :ccc [3 2 1]}
      {:a -4 :bb "444" :ccc [4 3 2 1]}]}}

Without pretty printing enabled (as before):

With pretty printing enabled (in normal mode):

With pretty printing enabled (in object mode):

---

• The commits are consistent with our contribution guidelines
• You've added tests (if possible) to cover your change(s)
• All tests are passing (eldev test)
• All code passes the linter (eldev lint) which is based on elisp-lint and includes
  • byte-compilation, checkdoc, check-declare, packaging metadata, indentation, and trailing whitespace checks.
• You've updated the changelog (if adding/changing user-visible functionality)
• You've updated the user manual (if adding/changing user-visible functionality)

[bbatsov]

(file-missing "Cannot open load file" "No such file or directory" "clojure-ts-mode")

That's happening because it now requires Emacs 30. (the TreeSitter support is quite buggy on Emacs 29 and I wanted to push more people to use a newer Emacs)

[r0man]

This is also ready from my side.

[r0man]

@alexander-yakushev I added back the customization option and some docs for it.

[alexander-yakushev]

Let's go!