v0.10.0: SICP-inspired redesign

hypothesize 0.10.0

SICP-inspired redesign with a consistent API for hypothesis testing.

Highlights

• Data abstraction: Tests are S3 objects with accessor functions (pval(), test_stat(), dof())
• Closure property: Combining tests yields tests (fisher_combine())
• Higher-order functions: Transform tests into new tests (adjust_pval())

Test types

• z_test() — one-sample z-test
• wald_test() — general parameter testing
• lrt() — likelihood ratio test for nested models
• fisher_combine() — combine independent p-values
• adjust_pval() — multiple testing corrections (Bonferroni, BH, etc.)