Highlight strings in Context values

[mint-thompson]

Completes task CIMPL-1114.

Try it out with some FSH with lots of Context keywords to see how you feel about these highlights. FHIRPath strings get the usual double-quote style applied. Other contexts don't get any particular style applied. The , token is highlighted, which should be helpful, but might also be distracting? I kind of like it, though.

[jafeltra]

This provides some nice consistency to the Context keyword values. I like the highlighted commas too.

One other thought I had, which is definitely just a question and not something that necessarily has to change, is that Context is now the only keyword that might not have any highlight/change in color. I tried changing some of the "name"s locally just to see how it would look, and I'm actually not sure if I like it, but I wanted to mention it to see if you had already considered it or what you think. I included a screenshot below:

This is what it looks like right now with this branch:

[jafeltra]

The new updates look good to me! ✨

[cmoesel]

I like it, and it seems to work quite well 99% of the time. I did, however, find that pesky 1% where it doesn't work quite right. If it's tricky to fix, I'm not worried about it; but in case it is easy, I'm letting you know:

[mint-thompson]

@cmoesel I managed to make a small improvement that handles the case you posted. There are still some cases that aren't handled (please don't start your line with a comma), but it's pretty usable.

[cmoesel]

This looks great, @mint-thompson! Thank you!