migrate to scikit-build-core

[jmoralez]

No description provided.

[codspeed-hq]

Merging this PR will improve performance by 53.32%

⚡ 7 improved benchmarks
✅ 31 untouched benchmarks

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	test_efficiency[AutoTheta]	14.4 ms	7.3 ms	+97.04%
⚡	test_efficiency[OptimizedTheta]	5.4 ms	3.4 ms	+58.23%
⚡	test_efficiency[DynamicOptimizedTheta]	5.4 ms	3.5 ms	+57.59%
⚡	test_efficiency[Theta]	4.8 ms	3.2 ms	+50.49%
⚡	test_efficiency[DynamicTheta]	4.8 ms	3.2 ms	+49.82%
⚡	test_efficiency[AutoETS]	409.8 ms	305.5 ms	+34.12%
⚡	test_efficiency[HoltWinters]	280.6 ms	209.3 ms	+34.03%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing jmoralez:migrate-to-scikit-build (38ce8db) with main (78ea6d4)}