[Gravedigger] Better initial starts and more highlight modes (#28)

[Infinitay]

WIP for more highlight modes support. Already have the basis and currently working on refactoring before implementing

• Add support for starting the plugin already in the instance
  • Tested and working
• Add configurable highlight options (Gravestone Icon, Coffin Icon, Highlight Grave, Highlight Coffin, Gravestone Text, Coffin Text)
  • Basic implementation of options and config changes
• Change the item icons into skill icons instead
  • Implemented but haven't tested

feat(gravedigger): Add support for starting in event (#28)

• Added proper support for handling initial runs when (re)starting the plugin when already inside the random event

[Infinitay]

refactor(gravedigger): Refactored rendering into separate methods

• Extracted rendering code into dedicated methods for better readability and maintainability.
• Preparing for the future rendering modes implementation
  • Conditionals/options

[Infinitay]

The latest commit fixes a circular dependency issue I was having when attempting to add RandomEventHelperConfig to GravediggerOverlay's constructor injection. I've exhausted my attempted at switching to using Provider, but it kept resulting in the same error regarding java.lang.IllegalStateException: Recursive load of: randomeventhelper.randomevents.gravedigger.GravediggerHelper.<init>(). As a result, I ended up relying on injecting the GravediggerOverlay into RandomEventHelperPlugin and modify GravediggerHelper#startUp to have the parameter of GravediggerOverlay - method injection.

This sets up future feature additions for optional highlights and to use skill icons instead of item icons.

fix(gravedigger): Fixed GravediggerOverlay circular dependency (method injection)

• Removed field injection dependency on GravediggerOverlay within GravediggerHelper
• Added GravediggerOverlay field injection within RandomEventHelperPlugin
• Now using method injection for GravediggerOverlay dependency within RandomEventHelperPlugin onto GravediggerHelper#startUp

[Infinitay]

feat(gravedigger): Add support for choosing between skill or item icons

• Added the option to select between showing skill icons or item icons related to the respective grave
• Added skill icon support to the Coffin object
  • Added Sprite ID for the related skill icon to the enums via associatedSkillSpriteID
  • Added #getSkillIconImage for fetching the BufferedImage of the skill
• Fetch skill icons from the SpriteManager via Coffin class and store them into the new coffinSkillImageMap
• Conditionally render skill or item icon within the overlay depending on config value
• Refactored config options by removing Options config section and re-ordering existing config
• Now adding sections for configurable modules with more options such as FreakyForester and Gravedigger
• Added gravediggerUseSkillIcons config option to use skill icons instead of item icons