linalg.norm (#187)

* implemented vector_norm in cpp

added linalg to mlx

* implemented vector_norm python binding

* renamed vector_norm to norm, implemented norm without provided ord

* completed the implementation of the norm

* added tests

* removed unused import in linalg.cpp

* updated python bindings

* added some tests for python bindings

* handling inf, -inf as numpy does, more extensive tests of compatibility with numpy

* added better docs and examples

* refactored mlx.linalg.norm bindings

* reused existing util for implementation of linalg.norm

* more tests

* fixed a bug with no ord and axis provided

* removed unused imports

* some style and API consistency updates to linalg norm

* remove unused includes

* fix python tests

* fixed a bug with frobenius norm of a complex-valued matrix

* complex for vector too

---------

Co-authored-by: Awni Hannun <awni@apple.com>

tests/CMakeLists.txt

@@ -31,6 +31,7 @@ target_sources(tests PRIVATE
   scheduler_tests.cpp
   utils_tests.cpp
   vmap_tests.cpp
+  linalg_tests.cpp
   ${METAL_TEST_SOURCES}
 )