Update weborker code to work with te CDN

[dpvc]

This PR resolves the problems we are having with using the worker code from the CDN. It rurns out that jsdelivr won't serve the HTML file for the worker pool (it wraps it in al in a

), so it doesn't run the code that starts the worker.  That ends up being a pretty big problem.

I will write more about it tomorrow, but for now, the big change is to remove the worker pool entirely and have the WebWorker.ts file create the worker itself and communicate directly with it.  The trick is to make a dynamically created blob object that imports the needed CDN file after a bit of setup.  Because the CDN has access-control headers that allow that, it works.  It also works if you host it on your own server, as there is no cross-origin issue.
This is a cleaner solution than our original, which is nice.  I was able to remove a lot of hacky code from the liteDOM, for example.
There is still an issue with the clearspeak menu, but I wanted to give you a chance to try it out and see what you think.
You will need to rebuild everything, including running the lab:sre script.

[codecov]

Codecov Report

Attention: Patch coverage is 50.52632% with 47 lines in your changes missing coverage. Please review.

Project coverage is 86.72%. Comparing base (62226e2) to head (81c1fa5).

Files with missing lines	Patch %	Lines
ts/adaptors/liteAdaptor.ts	39.02%	25 Missing ⚠️
ts/adaptors/HTMLAdaptor.ts	18.51%	22 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1285      +/-   ##
===========================================
+ Coverage    86.69%   86.72%   +0.02%     
===========================================
  Files          337      337              
  Lines        84107    83955     -152     
  Branches      3126     4750    +1624     
===========================================
- Hits         72919    72812     -107     
+ Misses       11188    11120      -68     
- Partials         0       23      +23     

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[zorkow]

One comment.
Otherwise this looks great. I particularly like that the LiteAdaptor, in particular LiteElement, is no longer dependent on mathjax at all.

[zorkow]

Should this happen in a separate method, as this is the only part that depends on the shape of the SRE configuration object, so it is clear where it needs to be changed in case that is changed?

[dpvc]

I've move the SREfeature changes to within the speech-worker.ts file, so all the SRE-related stuff is there. Does that resolve this issue for you?

[dpvc]

I particularly like that the LiteAdaptor, in particular LiteElement, is no longer dependent on mathjax at all.

Yes, I am glad to be able to remove that code as well. It was never ideal, but worked for what we needed. This is much cleaner, so for that reason, I'm glad we ran into the problem and were able to fix it in a better way.