Refactor minimum finding functions and tests

[djeada]

No description provided.

[Copilot]

Pull Request Overview

Refactors the array rotation minimum finding implementation by replacing two specialized functions with four distinct approaches, improving code organization and adding comprehensive testing coverage.

• Replaces simple linear and binary search functions with four different implementations (manual linear, library linear, manual binary, library binary with fallback)
• Consolidates test functions into a single generic template function runTests
• Adds a challenging test case with duplicates on both sides of the pivot

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