fix: parse decorators on properties

[alexlafroscia]

I work in a codebase that uses decorators quite a bit (Ember.js) and noticed that a decorator applied to a property didn't seem to work. The highlighting looks okay if there's not initializer, but if the property is initialized, you get something like this:

Screenshot of parsing error

After checking out the grammar, it seems like decorators on properties weren't really supported at all!

Now it should parse (and highlight) them correctly.

Screenshot of fixed parser

[alexlafroscia]

I also noticed that the src/parser.c file has diffs if you run tree-sitter generate on the master commit. Maybe someone slipped in a code change without re-generating it?

I have a GitHub Action set up to prevent this in a grammar that I maintain

https://github.com/alexlafroscia/tree-sitter-glimmer/blob/ca8d1533c91107039e7a3f84019378eefe357582/.github/workflows/verify.yml#L26-L51

If you're interested, I'd be happy to add something similar to the workflows for this repo so that that kind of problem is avoided here, too!

[alexlafroscia]

I went and rebased this PR so that it separates out the parser diff from master and the actual changes I'm trying to make.

[alexlafroscia]

It seems like the GitHub Actions configuration is maybe broken? CI didn't run at all here...

Edit: Fixed by #167

[maxbrunsfeld]

Thanks!