Coalpy

Bug fixes:
* Fixing bugs with UAV barriers. Sometimes when writting to a uav, adding some dispatches then writting to a uav again a wrong barrier would be used.
* wrong default maxLod for Sampler object
* Implemented correct tmp Sampler table (allows for inline arrays of Samplers to be passed in the command list dispatch command)
* wrong exceptions thrown when validating enums
* Missing Sampler object

* Added support for begin_marker and end_marker in CommandList object. This makes it possible to add markers for render doc.
* coalpy.gpu.schedule can now take a single CommandList object as an input (doens't have to be an array of lists)
* call to coalpy.gpu.set_active_adapter() can also take the flags parameter. This means we can now create a debug device by passing coalpy.gpu.DeviceFlags.EnableDebug. This lets you attach a debugger and see any dx12 failures if they exist.

* Support for imgui input_float2, input_float3, input_float3, input_float4 on ImguiBuilder api.

* Important bug fixes for Structured buffer /Raw buffer support as uav / srv
* Removing annoying asserts

Pre alpha release, includes mouse/keyboard input bindings for python.

Pre alpha release of coalpy. 0.0.3.
This version is considered to have a lot of the main features available. No big demo yet.