change Package children to be set of PackageableElement instead of array for performance

[MauricioUyaguari]

Summary

• add more logging to the graph building processes
• change package children to be a set instead of array
• Both changes help partial address RFC: Address graph building performance and memory usage #927

How did you test this change?

• Test(s) added
• Manual testing (please provide screenshots/recordings)
• No testing (please provide an explanation)

[changeset-bot]

🦋 Changeset detected

Latest commit: f240ebe

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 22 packages

Name	Type
@finos/legend-graph	Patch
@finos/legend-query	Patch
@finos/legend-server-depot	Patch
@finos/legend-studio	Patch
@finos/legend-application	Patch
@finos/legend-extension-dsl-data-space	Patch
@finos/legend-extension-dsl-diagram	Patch
@finos/legend-extension-dsl-text	Patch
@finos/legend-extension-external-format-json-schema	Patch
@finos/legend-extension-external-language-morphir	Patch
@finos/legend-extension-external-store-service	Patch
@finos/legend-manual-tests	Patch
@finos/legend-studio-extension-query-builder	Patch
@finos/legend-taxonomy	Patch
@finos/legend-query-app	Patch
@finos/legend-studio-app	Patch
@finos/legend-studio-extension-management-toolkit	Patch
@finos/legend-taxonomy-app	Patch
@finos/legend-graph-extension-collection	Patch
@finos/legend-query-deployment	Patch
@finos/legend-studio-deployment	Patch
@finos/legend-taxonomy-deployment	Patch

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[codecov]

Codecov Report

Merging #965 (f240ebe) into master (b138cf1) will increase coverage by 0.00%.
The diff coverage is 68.75%.

@@           Coverage Diff           @@
##           master     #965   +/-   ##
=======================================
  Coverage   42.84%   42.84%           
=======================================
  Files         967      967           
  Lines       44249    44262   +13     
  Branches    10276    10280    +4     
=======================================
+ Hits        18957    18966    +9     
- Misses      25218    25222    +4     
  Partials       74       74           

Impacted Files	Coverage Δ
...kages/legend-server-depot/src/DepotServerClient.ts	0.00% <ø> (ø)
...ckages/legend-query/src/stores/LegendQueryStore.ts	19.71% <28.57%> (+0.29%)	⬆️
...amodels/pure/packageableElements/domain/Package.ts	81.39% <100.00%> (ø)
...rc/models/protocols/pure/v1/V1_PureGraphManager.ts	62.20% <100.00%> (+0.21%)	⬆️
...kages/legend-studio/src/stores/EditorGraphState.ts	40.89% <100.00%> (+0.44%)	⬆️