fix: collections not detecting deltas

[NoelStephensUnity]

When using collections with NetworkVariable, it would only detect a completely new assignment of a collection but would not detect a change to an already assigned collection (add, remove, insert, clear) nor was there a convenient way to check if a collection or the values of its items/elements were dirty.

MTTB-305

fix: #2993

Changelog

• Added NetworkVariable.CheckDirtyState that is to be used in tandem with collections in order to detect whether the collection or an item within the collection has changed.
• Fixed issue using collections within NetworkVariable where the collection would not detect changes to items or nested items.
• Fixed issue where List, Dictionary, and HashSet collections would not uniquely duplicate nested collections.
• Changed permissions exception thrown in NetworkList to exiting early with a logged error that is now a unified permissions message within NetworkVariableBase.
• Changed permissions exception thrown in NetworkVariable.Value to exiting early with a logged error that is now a unified permissions message within NetworkVariableBase.

Testing and Documentation

• Includes integration tests in NetworkVariableCollectionsTests.
• Requires documentation updates.