Add NpApiOverload tests and relocate logic tests

Add comprehensive unit tests for NumSharp np API overloads: two new test files were added (NpApiOverloadTests_BinaryReductions.cs and NpApiOverloadTests_UnaryMath.cs) covering many binary reduction and unary math overloads to verify compilation and behavior after removing the `in` parameter modifier. Also rename/move InRemovalOverloadTests_LogicManipulation.cs to NpApiOverloads/NpApiOverloadTests_LogicManipulation.cs, update its namespace and class name, add a utility using, and annotate an existing failing dot-product test with OpenBugs and clarifying comments.

Author: Nucs