eyebrowse VS smartparens

An Emacs package is just Emacs Lisp code that adheres to package conventions. If you can write moderately complicated code in your init file and believe that it may be useful to other people, put it into its separate file, add package headers/footers, adjust to package writing conventions and it's ready for publishing. I've learned all that from looking up the documentation and most importantly, studying other packages. I was at that point one year into my Emacs journey and published https://github.com/wasamasa/eyebrowse shortly after.

Check out smartparens which supports several non-lisp languages including c and js. Learn more here: https://github.com/Fuco1/smartparens

For working with delimiters, you might want to check out Smartparens or Puni. There are many other packages like these, but those are the two I know about.

I think the following packages would fit your wishlist, as it is very similar to mine. As mentioned in the replies, there is (https://github.com/magnars/expand-region.el) and (https://github.com/mickeynp/combobulate). I regularly use (https://github.com/Fuco1/smartparens).

This particular issue has been reported there: https://github.com/Fuco1/smartparens/issues/1017

smart-parens bracket/parens matching is nice

Emacs seems to attract quite a lot of people who want structural code editing. We now have * paredit * smartparens * evil-cleverparens * lispy * symex * combobulate (more?)

Smartparens is trying to bring the paradigm of lispy/paredit to other languages, though the reality is that the non-structured syntax of other languages do not offer the best experience.

If you want to do automatic pairing of Org's markup delimters (which depend on context), I suggest instead trying Smartparens (https://github.com/Fuco1/smartparens), which already supports such pairing.

If not, there is also show-smartparens-mode from the Smartparens package, which is buffer-local.