Add Friendly Robber game option

[bcollazo]

Summary

• add a Friendly Robber game option in the core library and CLI
• expose Friendly Robber through the web API and HomePage UI
• fix robber action pruning when friendly robber removes enemy-owned robber targets

Testing

• uv run pytest tests/test_game.py tests/models/test_actions.py -q
• direct CLI smoke test with --config-friendly-robber

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[coveralls]

Pull Request Test Coverage Report for Build 23409872998

Details

• 29 of 30 (96.67%) changed or added relevant lines in 6 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+1.4%) to 93.9%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
catanatron/catanatron/web/api.py	2	3	66.67%

Files with Coverage Reduction	New Missed Lines	%
catanatron/catanatron/players/minimax.py	1	96.35%
catanatron/catanatron/players/tree_search_utils.py	1	94.59%

Totals
Change from base Build 23407636985:	1.4%
Covered Lines:	3279
Relevant Lines:	3492

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💛 - Coveralls