[TS] Add Defence buildings to the AI
add lore to the description
make carryalls initially lift-off from high tech factories
enable high tech factory welding
fix overlapping shadows
split Hovers from WithShadow

fixes #4508
move carryall to it's own aircraft queue
Merge pull request #6896 from LipkeGu/ai_waepons

[TS] Add Defence buildings to the AI
Merge pull request #7033 from Mailaender/d2k-carryall-tweaks

Tweaked spice harvester carryalls
Refactor Upgrade => Condition[Level], ...
Closes #7047