Enum class fix for fmt 8.x

[COM8]

Since fmt 8.0.0 enum classes are not being implicitly converted to int any more.
Refference: fmtlib/fmt#1841

Since I have to use fmt 8.0 and therefore can not use the one provided by Kompute, I defined a format extension for kp::Tensor::TensorDataTypes and kp::Tensor::TensorTypes.

I'm not too sure if they are required in both classes Tensor.hpp and Kompute.hpp.
Also let me know if the formatting of the code is fine that way, since I was not able to find any guidelines (e.g. a .clang-format file).

[COM8]

Also fixes #282

[axsaucedo]

Nice one @COM8 - looks good. In regards to your question, we don't have a .clang-format, we should really add one as currently the format is done through the makefile:

kompute/Makefile

Lines 200 to 201 in 221ad18

	format:
	$(CLANG_FORMAT_BIN) -i -style="{BasedOnStyle: mozilla, IndentWidth: 4}" src/*.cpp src/include/kompute/*.hpp test/*cpp