feat: specialized linear layout solver for decoupling capacitors

[Angelebeats]

This PR introduces a dedicated DecouplingCapLinearLayoutSolver to ensure decoupling capacitors are perfectly aligned in a single row.

Key Improvements:

• Precision Alignment: Implements a specific solver for decoupling_caps partitions that enforces linear horizontal placement.
• Enhanced Identification: Refactored IdentifyDecouplingCapsSolver to be more flexible, supporting both horizontal and vertical orientations and relaxing unnecessary rotation constraints.
• Robustness: Fixed a crash in Side.ts normalization for the op side.
• Verification: Included a comprehensive test case in ests/LayoutPipelineSolver/DecouplingCapLinear.test.ts verifying perfect alignment for 10 capacitors of mixed sizes.

Closes #15. /claim #15

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