return NotImplemted for unsupported operations in __array_ufunc__ and implement matmul #160

Job	Run time
code-health	36s
build-and-test-correctness (ubuntu-24.04)	1m 41s
build-and-test-correctness (ubuntu-24.04-arm)	2m 7s
build-and-test-correctness (macos-14)	1m 25s
build-and-test-performance	1m 9s
	6m 58s

Provide feedback