Added an implicit operator to get a value from a ScriptableVariable so you don't have to type .Value when using its value.

Added an indexer override and Count function.  Renamed the list changed event and added another one for when a list item changes.

Added a new type of scriptable variable that handles lists of values.  The list itself is not accessible externally and any function that modifies it fires an event that the value has been changed.

Added a component for firing game events on Unity Start and added the ability to delay firing Unity Events when a Game Event is being listened to.

Added a class that maps Unity Input Actions to Game Events.  The shared package is now dependent on the Unity Input system package until it's permanently part of the engine.

Wrapped the game event listeners in a try/catch block so that if some listener to a GameEvent throws an exception, any other GameEventListeners will still get their functions called.

Apparently events can't be fired from inherited classes, so the ScriptableVariable base class now has a protected function to fire its OnValueChanged event.

Separated out the concrete UnityEvents that get used a bunch when using ScriptableVariables into separate files and added a bunch of monobehaviours to fire unity events based on variable values.

Test to see if I can get the context menus to create the scriptable objects to work with Unity's Package Manager before I put in all the work to redo all this stuff.