Adds a new event, CAS supply increase

[RipGrayson]

About The Pull Request

It's a new event, Tivi wants more of them and I sat down and made some.

CAS supply increase looks at the total number of POs and adds between 50 and 175 points to the ammo fabricator per pilot (for reference, a single missile cost is around 200 points). The total number is capped at 300.

Why It's Good For The Game

More events good.

Changelog

:cl: add: Added a new event, CAS supply increase /:cl:

[github-actions[bot]]

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