Create a new demo folder for examples on a linux desktop

[yuanchen8911]

This PR creates a new demo folder desktop within the quickstart directory. It provides examples that can run on a Linux desktop or workstation equipped with an NVIDIA GPU, such as GeForce.

There are a total of 8 examples for different configurations with consistent and descriptive naming for test filenames, namespaces, and pod names. A detailed description of each example with the command along with sample outputs.

• A single pod accesses a GPU via ResourceClaimTemplate
• A single pod's multiple containers share a GPU via ResourceClaimTemplate
• Multiple pods share a GPU via ResourceClaim
• Multiple pods request dedicated GPU access
• A single pod's multiple containers share a GPU via MPS
• Multiple pods share a GPU via MPS
• A single pod's multiple containers share a GPU via TimeSlicing
• Multiple pods share a GPU via TimeSlicing

We could replace the examples in the current quickstart folder too.

[klueska]

Thanks for putting this together. Quick question before looking at this in detail -- why the subfolder of desktop what other folders do you expect to put next to this? I would expect the "quickstart" examples to already be runnable on any desktop with at least 1 GPU on it (even if this may not be true at the moment).

[yuanchen8911]

@klueska, can you take a look when you get a chance? Thanks.