Add assistant to the pog plugin manifest.

[Issue: ]
Continue auto discharge if some POs unsupported.

[Issue: ]
Improve UI for unsupported POs.

* Show the PO predicate for unsupported POs
* Generate and export supported POs for partially supported models.

[Issue: ]
Fix iteration of param types in implicit funcs.

[Issue: #299]
Add a rudimentary playground test.

[Issue: ]
Merge remote-tracking branch 'origin/development' into ldc/main
Ignore QuickTest in TP.

[Issue: ]
Add minimal test for issue 300.

[Issue: #300]
Add lexlocation to ActionDefs introduced by mu.

[Issue: #301]
Test and result for issue 301.

[Issue: close #301]