Enhancements for shader code visualization and VGPR pressure analysis in the Instruction timing window

[kruseborn]

In the instruction timing window, it would be beneficial to be able to see the shader code as well. A split view with the instructions on the left and the code on the right would be ideal. When you select an instruction, it would highlight the corresponding lines in the shader code.

It would also be very helpful to see the VGPR pressure in the instruction timing window, similar to what you can see in RadeonGPUAnalyzer