Feat(designer): Updates to Custom Code (boilerplate, host.json, optimizations)

[Eric-B-Wu]

This is adding adding a few new features/fixes as part of custom code namely:

1. Adding boiler plate code for powershell and c sharp that will be set on initialization
2. Fixing Token picker outputs for powershell and c sharp
3. Adding Host.json changes needed for powershell
4. Cleaning up some code

[hartra344]

Can you add an explanation for how this is breaking? Will this require changes for PA/ICM?

[Eric-B-Wu]

Can you add an explanation for how this is breaking? Will this require changes for PA/ICM?

Oh I guess its only breaking for us because we'll be the only one that'll require changes. There were some functions that were used previously in our Portal repo that were removed. I'll need to basically update the DesignerEditr with he changes I've made here in standalone.