Animation instant transition on unequipping ammo mid-attack

Issue Description

If you unequip, or lose, your ammo during a bow attack animation, openmw instantly cancels the animation, leading to a jarring transition back to idle.

Vanilla Morrowind plays the full bow animation to its end, without the ammo.

Steps to Reproduce

Wind up a bow attack but unequip your arrows without releasing.

• OpenMW: instant transition to idle on closing inventory
• Morrowind: release animation plays on closing inventory

System Information

• OpenMW Version: Revision db7feb82
• Operating System & Version: EndeavourOS kernel 6.18.9
• GPU: RX 7900XT
• Morrowind Version: Steam
• Language: English
• Addons: Tribunal, Bloodmoon

Mods

• Are you using mods? No
• Are you using any shader mods? No
• Does it happen in a clean vanilla install? No

I don't think any further details or logs are necessary since the code that cancels the animation is easily identifiable: https://gitlab.com/OpenMW/openmw/-/blob/59a2ccdf1157263087715125639a1ce37a4b904f/apps/openmw/mwmechanics/character.cpp#L1330

The correct behavior in this case would be to transition to release, skipping projectile/ammo related actions.