Add issue and PR templates & build optimum env cli for Neuron

[JingyaHuang]

as per title. As there are community members asking for support for some model arch, I would like to complete the templates to make it easier for them.

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Ouput of the cli env:

optimum-cli env

Copy-and-paste the text below in your GitHub issue:


Platform:

- Platform: Linux-5.15.0-1052-aws-x86_64-with-glibc2.29
- Python version: 3.8.10


Python packages:

- `optimum-neuron` version: 0.0.19.dev0
- `neuron-sdk` version: 2.16.1
- `optimum` version: 1.16.2
- `transformers` version: 4.36.2
- `huggingface_hub` version: 0.20.3
- `torch` version: 1.13.1+cu117
- `aws-neuronx-runtime-discovery` version: 2.9
- `libneuronxla` version: 0.5.669
- `neuronx-cc` version: 2.12.68.0+4480452af
- `neuronx-distributed` version: 0.6.0
- `neuronx-hwm` version: 2.12.0.0+422c9037c
- `torch-neuronx` version: 1.13.1.1.13.0
- `torch-xla` version: 1.13.1+torchneurond
- `transformers-neuronx` version: 0.9.474


Neuron Driver:


WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

aws-neuronx-collectives/unknown,now 2.19.7.0-530fb3064 amd64 [installed]
aws-neuronx-dkms/unknown,now 2.15.9.0 amd64 [installed]
aws-neuronx-runtime-lib/unknown,now 2.19.5.0-97e2d271b amd64 [installed]
aws-neuronx-tools/unknown,now 2.16.1.0 amd64 [installed]

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[dacorvo]

Nice ! Thanks !