Convert phetioCompareAPIs to Typescript

[zepumph]

https://github.com/phetsims/phet-io/issues/1951
phetsims/perennial#410
phetsims/perennial#403
#1465

This typescript module can then be used in sim AND build-tools code.

[zepumph]

Converted and fixed in the above. The webpack build was ignoring files from /phet-io/ in phet brand build (what phet-io-wrappers standalone was build in).

[zepumph]

@samreid can you please give a spotcheck. Mostly for the typescript in chipper/js/phet-io/

[samreid]

I read the recent commits and everything seems reasonable. I tested by renaming a tandem and running grunt pre-commit --phet-io-api and it correctly caught the change. Closing.

[phet-dev]

Reopening because there is a TODO marked for this issue.

[samreid]

I can address these TODO's, I forgot to search them during the code review. Leaving self-assigned.

[samreid]

I'm uncertain what to do about getStringMap TODO, and the other 3 todos are unclear whether they were meant to be a question for the review. @zepumph can you please advise?

[samreid]

@zepumph and I reviewed this issue, and we feel this is high priority to discriminate between browser-and-node code and make sure it is correctly typed via a tsconfig.json file. We need browser-and-node/ in perennial-alias and chipper. For instance, these files should not know what process.exit() is. While this remains a high priority, it does not need to block publication for new RCs.

[zepumph]

Alright. All TODOs have been handled, and we will pick things up in phetsims/perennial#418