Add `isHardened` to `derivedStats`

Intent

Add isHardened getter to derivedStats following the rules in Danger Gal Dossier pg 150:

We then use this data to display if a character is considered hardened on their character sheet and list the reasons:

---

• This is meant for a hotfix
• This is meant for the next release (see milestone)
• This needs more reviewers than normal; there may be controversy or high complexity
• This intentionally introduces regressions that will be addressed later
• There is/will be documentation changes on the wiki
• Please do not send commits here without coordinating closely with the owner
• This is a Build System change

Related Issues

• #959 (closed)

Steps to Test

1. Checkout/Build/Load
2. Create Character
3. Configure each way a character can be hardened following DDG pg 150
   • Martial Arts
     • Create a new skill (or multiple) with the skillType of Martial Art it can have any name
     • In the tooltip it should show with the human readable name of the skill
   • Attack at >= 15
     • Create or edit a weapon to have a non-standard attack skill (EG: Stealth)
     • Make sure that skill + stat + mods = 15 or more
     • Skill should show in reason tool-tip
   • Active Effects
     • For all rules which are based on stats/skills should be affected by Active Effects bonuses
4. A shield will appear over the Character's Image on the sheet once any of the conditions are met
5. Hovering the shield will list the reason the character is considered hardened
6. Switch to another language
   • While we don't have full translations things like STAT names should be translated within strings

Note: Requires !1246 (merged) to be merged before this as it builds upon that work

Future Work

This datapoint could be used in any future mook/encounter generator.