[GENERAL] Merged einsum feature branch. Various feature, performance

improvements and bugfixes:

* Added preliminary support for extended Einstein summation in PyTriton
* Significant performance improvement on FP32 kernels containing matrix
multiplication
* Added re-coalescing pass for FP16 kernels containing matrix
multiplication
* Various bugfixes

python/setup.py

@@ -77,7 +77,7 @@ class CMakeBuild(build_ext):
             pass
 
         cfg = 'Debug' if self.debug else 'Release'
-        #cfg = 'Release'
+        cfg = 'Release'
         build_args = ['--config', cfg]
 
         if platform.system() == "Windows":