Updateable firing anim

[TaranDahl]

Updateable firing anim

• In vanilla, firing anims is attached to the firer, but it won't update its type and location to fit the firer's facing. This is now customizable by the following flags.

In rulesmd.ini:

[AudioVisual]
FiringAnim.Update=false   ; boolean

[SOMEWEAPON]              ; WeaponType
Anim.Update=              ; boolean, default to [AudioVisual] -> FiringAnim.Update

This effect will cause problem when used together with `[AnimType] -> Next`. `Next` modifies the Anim type over time, while this function changes it back, resulting in the Anim being unable to end.

[github-actions]

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[Otamaa]

LGTM