Tutorial, hornet & demolisher, destructible terrain

New stuff

• Start menu (lofi fields to drive mechs in)
• New tutorial scenario (only minor tutorialization rn)
• Everest mech in tutorial, including Hyperspec and Initiative
• Seismic ripper & line attacks
• Bumped squad size for the albatross mission back up to 4
• Grunt NPC template (only used in tutorial)
• Demolisher NPC
• Hornet NPC
• Flying mechanics - they can see everyone & everyone can see them, immune to terrain & engagement & melee weapons
• NPC weapons with recharge values have to recharge
• Made human-pilot-scale units, can mount up into empty mechs & fire their tiny pilot weapons
• Destructible terrain (currently only damaged by AOE)
• Loading screen for levels (there's still a bit of a hang on mission start, will continue to address)
• Flip units as they move left/right
• Turn units sideways when they are prone
• Added save target to stats
• Better gear chooser animation for the radial menu circle
• show both weapon and standard movement ranges when mousing over a unit

Bugfixes

• Lock on is now an ability, not an attack
• NPCs can't exceed their heatcap
• fix bug where moving on off-turns spent your on-turn movement points as well as losing all movement when re-engaging on the same turn
• slag spray cannot be placed on existing terrain
• don't show "engaged" message on movement; as prophesied, it was too noisy
• Partisan doesn't apply to ram/improvised attack
• Ram can't target larger mechs
• Missions can end in defeat
• AP weapons now pierce armor
• Renamed "activate" in action menu to "use"
• Improved AI
  • will now prefer someone they can see who is a little further away to someone they can't see who is technically closer
  • prefer equipped > talent > frame > basic gear