Centralize side effect management

[boydc2014]

Leave the side effect (lu/lg/qna) management into the caller side (form\visual) is an architecture is fragile and very error-prone architecture. In the past, we've fixed many issues, regressions on those operations. See blow of the list.

Letting shell take control the side effect management will lead us to a more stable, testable architecture which have a higher level guarantee of correctness of the application.

This would include a generic change detection mechanism in shell and a pub-sub mechanism to call certain actions under certain changes. This would also make the application more extensible for further customization.

Note: this ticket is a pure refactoring, only cover the centralization part, without creating any new v property.

[zhixzhan]

FYI, some previous issue on areas that generate side effect.

undo/redo

• undo / redo support for nodes with lu and lg undo / redo support for nodes with lu and lg  #2212

copy/paste

• Cross-file copy of LU / LG resources Cross-file copy of LU / LG resources #2207
• Unable to copy actions across dialog files Unable to copy actions across dialog files #2199
• Need to support LU intent copy / delete / move Need to support LU intent copy / delete / move #2273

concurrency

• Shell - debouncedUpdateLg cannot handle paralleled lg update requests Shell - debouncedUpdateLg cannot handle paralleled lg update requests #2247
• fix: concurrency control in persistence layer fix: concurrency control in persistence layer #2742

resource consistency

• Delete trigger should also delete LU intents and LG templates Delete trigger should also delete LU intents and LG templates #2209
• Auto-generated Bot Response templates are not removed when entire dialog (trigger) is deleted Auto-generated Bot Response templates are not removed when entire dialog (trigger) is deleted #2150
• Multi nodes deletion should also delete the lg template Multi nodes deletion should also delete the lg template  #2210

editor calling

• LG template name not correct LG template name not correct #2726
• New LG templates aren't get synced to other languages New LG templates aren't get synced to other languages #4228
• [dialog factory] create lg template when an lg field has a default value [dialog factory] create lg template when an lg field has a default value #2406

other entrance

• Manually added json node doesn't have designer id and cannot edit lg text Manually added json node doesn't have designer id and cannot edit lg text #1776

previous discuss

• Unify dialog CRUD on shell action center. Unify dialog CRUD on shell action center. #2699
• Unify Adaptive elements' delete / create / copy behavior in Composer / Form / Visual Unify Adaptive elements' delete / create / copy behavior in Composer / Form / Visual #2312

[boydc2014]

Close this for now, since it's out of date.