Add reference to clj-proj bindings

[willcohen]

(Claude assisted me in development of clj-proj itself, not my changelog note)

• [X] AI/LLM (Copilot, ChatGPT, Claude or something similar) supported my development of this PR
• [ ] Closes #xxxx
• [ ] Tests added
• [ ] Added clear title that can be used to generate release notes
• [ ] Fully documented, including updating docs/source/*.rst for new API

[kbevers]

There's a few complaints from sphinx when building the docs that need to be adressed before merging:

 /__w/PROJ/PROJ/docs/source/development/bindings.rst:5: WARNING: Duplicate explicit target name: "clj-proj". [docutils]

you probably have to change the wording in the link for this one to get through.

source/development/bindings.rst:45: : Spell check: js: ES6 module with WASM-compiled PROJ for Node.js and browsers.
...
WARNING: Found 1 misspelled words

I assume the "misspelled" word is one of those in line 45. The warning should disappear if the word is added to /docs/source/spelling_wordlist.txt.

[willcohen]

@kbevers sorry for letting this sit. passes ci now.