[KnightStackSys]

Summary

Adds a dedicated rook_eval.cpp module and 11 UCI-tunable rook feature weights, wired into the existing hand-crafted evaluation with the established Red+Yellow vs Blue+Green score convention.

Features

• Pawnless/endgame rook activity: up to EvalRookPawnlessBonus per rook as the original 32 4PC pawns disappear.
• Open / semi-open owner-oriented files: distinct tunables, accounting for friendly and enemy pawns on the rook owner's actual vertical/horizontal advance file.
• Seventh / eighth ranks: interpreted as the enemy army's second/home line, rotated for each of the four players, not hardcoded orthodox ranks.
• Tarrasch rule: distinct rook-behind-friendly and rook-behind-enemy passer bonuses, using a conservative two-enemy, four-direction pawn corridor check; unobstructed direct rook-to-pawn line required.
• Uncastled king blocking a rook: narrow penalty for an immobile rook still on its configured castle origin, with the corresponding king home, active castling right, and a friendly pawn/piece immediately in front.
• Enemy queen sharing rook's advance file: small bonus even on a closed or screened file.
• Connected/team rooks: direct rook-to-rook line-of-sight, counting own/partner rook pairs exactly once.
• Supported rook on an enemy second rank: extra separately tunable term.

New UCI spin options (0–100)

EvalRookPawnlessBonus=12
EvalRookOpenFileBonus=18
EvalRookSemiOpenFileBonus=9
EvalRookSeventhRankBonus=16
EvalRookEighthRankBonus=10
EvalRookBehindFriendlyPasserBonus=12
EvalRookBehindEnemyPasserBonus=8
EvalRookUncastledKingBlockPenalty=12
EvalRookQueenFileBonus=6
EvalRookConnectedBonus=12
EvalRookSupportedSeventhBonus=8

All options accept setoption name ... value ..., appear in uci and tuneparams, and reset through ResetTuning. Values are starting hypotheses, not empirically tuned.

Verification

• Adds ironphoenix_rook_features to CTest, covering tuning limits/reset/options, file and phase conditions, rotated opponent home lines, both passed-pawn categories, sliding blockers, castle-right-dependent king blockage, queen-file pressure despite screens, teammate rook connections, and side-to-move team sign.
• No changes to move rules or search.
• Applies to HCE only; when NNUE is loaded, the existing NNUE evaluator continues to take precedence.

Testing recommended before merge

Run CMake/CTest in CI, then A/B STC and LTC matches (single feature weights toggled to zero and combined feature set). Profile NPS in tactical/open and closed positions. Do not treat these initial constants as proven Elo gains.