fix(ai): comprehensive AI improvements for active production

[braedonsaunders]

Multiple fixes to make AI more active and aggressive:

1. Build order no longer skips steps when waiting for requirements

   • Added pre-checks for building requirements and production buildings
   • AI now waits properly instead of counting as failure and skipping

2. Macro rules now run alongside build order (not instead of)

   • AI keeps producing units/workers while waiting for build order steps
   • Prevents idle accumulation of resources

3. Lowered macro rule thresholds for earlier activation:

   • infantry_bay_first: workers 10 -> 6
   • extractor_first: workers 10 -> 8
   • workers_basic: faster cooldown, higher saturation cap
   • train_army_aggressive: lower mineral threshold, faster cooldown

4. Added catchall rule to spend excess minerals

   • Triggers at 200+ minerals to prevent floating resources
   • Trains mixed infantry at high rate

These changes ensure AI stays active throughout the game instead of getting stuck waiting for requirements or floating resources.