KKV, OffsetWeapon fix, more orbital stuff

[josuenos]

• Add minimum firing speed option. If below this speed and within weapons range, AI will increase speed.
• Add option for AI using RCS to manage velocity relative to the target when firing (enabled by default).
• Missiles with RCS will use RCS to offset gravity if they don't have aero or are in near vacuum.
• Add new Kinetic Kill Vehicle (KKV) missile. The KKV is an orbital missile with 6 km/s delta-V and no warhead. It relies on kinetic energy from hitting a target directly to deal damage.
• Missiles with RCS can now have multiple forwardRCS transforms.
• Fix null fireTransform issue with UpdateOffsetWeapon()
• Fix weapon manager not considering kinetic warhead missiles as threats.
• Don't show detonation distance settings for kinetic missiles
• Adjust anomalous attraction factor for asteroids in orbit. Attraction now gradually increases from 1km, peaking at 500m, then gradually decreases to 0 at 0km to avoid asteroids accelerating quickly into nearby vessels.
• Add option to toggle RCS evasion on/off
• Add option to evade gunfire using engine thrust
• Clamp firingSpeed, ManeuverSpeed as min, max
• Fix kill velocity continuing beyond speedTarget
• Hopefully more consistent RCS evasion
• Ramming mode for OAI
• Fix wrong relVel direction in BDModularGuidance OrbitalGuidance
• SI armor fixes