Add local parser building functionality

[ethan-leba]

This PR will make it possible for users to build TS grammars locally with no external CLI dependencies, which is a big win for making that an accessible option for users.

A couple points of discussion:

1. Pulling in tree-sitter-cli brings in a non-trivial amount of unrelated cli-based dependencies in order to use it's tree-sitter generate functionality. Do we think it's worth it?
2. Building a parser takes about 3s on my machine, more so if we're generating as well. Do we want to consider some sort of asynchronous build option?

I'm open to any and all changes in order to make this PR easier to merge/ fit better with the codebase!

If/when this gets merged, we'd likely also want to rework tree-sitter-langs to use this function.

[ethan-leba]

This feels a bit hacky to me, but I think users will want the build directory to default to the TSL grammar dir 99% of the time

[knobo]

How about improving the situation with something like this:

(defvar tsc-dst-path-decider-func #'tsc-default-dst-path-decider
  "Function to decide the destination path for building the parser. 
Takes `src-path` and `dst-path` as arguments, should return the final `dst-path` to use.")

(defun tsc-default-dst-path-decider (src-path dst-path)
  "Default function for deciding destination path."
  (or dst-path (bound-and-true-p tree-sitter-langs-grammar-dir)))

(cl-defun tsc-build-parser-from-source (src-path &key generate dst-path)
;;;;
   (if-let ((dst-path (funcall tsc-dst-path-decider-func src-path dst-path)))

[ethan-leba]

@ubolonton there appears to be a regression with windows CI unrelated to this PR, tested with an empty commit here: #221

[ubolonton]

Windows CI used to pin Emacs version, but no longer does, after this supposedly temporary change.

This likely means the test hl::face-mapping fails on Emacs 28.