[FEATURE] Refactor, add a generic helper for creating delayed actions with saveable progression

[ReveredRedHood]

Introduction

Description of the feature
Consider making a more generic helper for "create a delayed action that accounts for game state, and which also saves and loads partial progression successfully". It seems like a helpful utility in general, and we have two use cases already with illegal status modifiers and input suppression entries.

Feature usage
Plugins would use it to simplify handling persistent states. It would be useful any time a mod wants to temporarily change the state of something which, if that state change is not persisted across saving and loading, would cause broken functionality.

Dependencies and Prerequisites
None

Implementation details
Might look like this (or maybe it would be named something like PersistentState):

public abstract class GameTimeAwareAction {
  // time tracking instance properties go here...
  // Start, Stop, Pause, and Tick are implemented methods in the abstract class
  public abstract string GetUniqueString();
  public abstract string GetSavestorePathPrefix();
  public abstract string GetStateAsJson();
  public abstract void LoadStateFromJson(string json);
  public abstract void OnAfterStarted();
  public abstract void OnAfterTicked(deltaTime, timeSinceStarted, duration);
  public abstract void OnAfterExpiration();
}
// In a helper library elsewhere...
public GameTimeAwareAction CreateGameTimeAwareAction(...); // not sure of the params here, might involve plugin metadata
public List<GameTimeAwareAction> GetGameTimeAwareActions(predicate);

SOD.Common would handle saving and loading for the mods, like it does now with illegal status modifiers.