Add warrior trait assignment event

[thefinestsieve]

Add an event which replicates the PB startup assignment of warrior traits. This could come in startup event form for usage cases without PB, or it could be for individuals and called on newly generated characters such as in employment decisions.

[zijistark]

I was going to do this for EMF, so I can just code it for the HDE and call your code.

[zijistark]

FYI, I've started work upon a new warrior trait assignment event and done some cleanup in duel_cte generally. I've forked HDE and am 2 commits in at present. I will call this in EMF whenever I need to initialize a character with no combat traits, including scenario startup.

• The new event will be a bit more dynamic than PB's but simply balanced and given an interesting randomization factor with the help of variable math operations from 2.1.5.6.
• It will also take into account a few more factors than the current PB implementation does but remain minimal.
• The event respects historical trait overrides.
• I will not include tier-based / is_ruler = yes type factors, keeping in mind that it may be used to generate lowborn scum to duel, and their random traits / other demographics may be allowed to make that random scum somebody worthy of fighting. [Or generally for generation of courtier characters that might become rulers.]