Adds bots/economist/bot.py and Dockerfile implementing a new strategy:
deliberately contest energy nodes that enemies are approaching to
destroy the contested energy, denying enemy income while harvesting
uncontested nodes for own economy.
Strategy priorities:
1. Maintain existing contest assignments (stay put)
2. Contest threatened nodes (intercept approaching enemies)
3. Reserve 1-2 bots to guard cores
4. Collect uncontested energy
5. Remaining bots explore toward map center
Pure collection mode when score lead ≥3 and turn > 200.
Co-Authored-By: Claude <noreply@anthropic.com>
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