Add watchpoint support

[isc-bsaviano]

This PR fixes #697

[isc-solon]

I remember this being completed, but I don't see a way in VS Code to actually declare a watchpoint, and this capability is not documented. Adding @rajrsingh

[gjsjohnmurray]

@isc-solon does the information at https://code.visualstudio.com/Docs/editor/debugging#_data-breakpoints get you anywhere?

[isc-solon]

Thanks, John. I didn't think to check the code doc itself. Very clear. But...my context menu only shows "Add to Watch" and none of the "Break on" options.

[gjsjohnmurray]

Here's what I get:

And after I select it a new entry appears in the BREAKPOINTS section:

Then after I continue (F5) here's where execution next stops:

[isc-solon]

Fascinating! Whether I'm in a class method or a .Mac routine, and whether or not I right-click on the variable in the Variables section or the Watch section, I don't see "Break On Value Change".

I'm on the latest versions of VS Code and the extensions, and I'm running v2023.2 of IRIS for Health in a container. I don't have that "proposed APIs" thing enabled.

[isc-rsingh]

Using VS Code "regular" edition (v1.82.2) I don't have a "Break on value change" menu item either, but using VS Code Insiders (v1.84.0-insider) with proposed APIs I do see that option.

VS Code "regular":

Insiders:

[isc-solon]

Do "proposed APIs" ever become "standard APIs?"

[isc-rsingh]

We're hoping so...

[gjsjohnmurray]

What you're seeing is unrelated to proposed API. Please see #1252 (comment)