RFE: Add min/max age requirements for roles and allow re-assignment back to 'None' as a primary role

[mjbroekman]

Environment

MekHQ 0.47.16
Java version 15.0.1
Platform Mac OS X 10.15.7 (x86_64)

Description

Currently, when children are born, they are generated as per normal characters, which means they can sometimes have skills, abilities, and implants on day 1.

Example:
This 1yro has gained enough XP to get Piloting and Gunnery Mech... they were generated with the rest.

Additionally, they gain XP and, depending on how periodic XP is granted, can be trained as combat personnel (typically 5xp each for piloting and gunnery) within 2 years (and mechtechs are even easier to train).

Suggestion

• Add minimum age requirements for roles (configurable in Campaign Options):
  -- 16 for adminstration roles
  -- 14-16 for combat roles
  -- 12 for tech roles
  -- 12 for medical roles
  -- 5 for Astech
  -- 0 for None, Child

• Add configurable maximum age limits for roles (configurable in Campaign Options)

• Add a 'Retiree' role that characters acquire upon hitting the maximum age limits
  -- These are NOT retired characters (removed from the roster), these are experienced characters that are on the roster but too old to perform in their old roles.

• Add a 'Child' role that newborns default to and that characters below age 16 can be assigned to.

• Allow anyone, at any time, to be assigned the 'None' role.

• Reduce XP gain for children to 1xp per X months (defaulting to 1 per 6 months) up to the time they go into a role with task-based XP gain.

• Add optional XP gain for children on their birthdays (configurable in the Campaign options)

• Add 'training' XP such that 'Retiree' characters convey 1 XP per period of time to a random character that is lower skilled and in their former role. (Greybeards showing the kids what's what).

Additionally, I would submit that newborns should be generated with zero XP, no skills, and no abilities.

[Windchild292]

I've started making changes to PersonnelRoles in #2352. First up is an Enum swapover, then I can make the other changes far easier. Most of these are somewhere on that list of changes.

[Windchild292]

The Child, Retiree, and None primary roles have been combined into the single Dependant Personnel Role. None is only valid as a secondary role in our internal implementation from now on.

[repligator]

99.99% implemented during 49.19, 49.20, 50.00, and 50.1. In particular, see #4521 . Closing as completed. If anyone feels that one of the features mentioned has not been addressed, please consider opening a new issue to focus on that particular feature.