Arm backend: Added TOSA workflow minimal example

[Michiel-Olieslagers]

Added a python notebook containing a minimalistic example of how to best use the TOSA workflow within the ARM backend. This is intended for validating and experimenting with model lowering to TOSA, and is aimed at contributors and developers, rather than production deployment.

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/13727

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• Multiple CI trunk failures after landing https://github.com/pytorch/pytorch/pull/161002

❌ 6 New Failures, 1 Unrelated Failure

As of commit 24ef634 with merge base b4e1145 ():

NEW FAILURES - The following jobs have failed:

• Apple / build-benchmark-app / macos-job (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 1
• Apple / build-demo-ios / macos-job (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 1
• Apple / build-frameworks-ios / macos-job (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 1
• Build documentation / build (buck2) / Build doc (gh)
  At least one of the pre-conditions you specified did not hold
• pull / test-llava-runner-linux / linux-job (gh)
  RuntimeError: Command docker exec -t a6046029e9b7facad64d2bc2823b73acb57bc93b0759fe039f50c26e9b9bf249 /exec failed with exit code 139
• trunk / test-coreml-delegate / macos-job (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 1

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• trunk / test-huggingface-transformers-coreml (qwen3-1.7b|xnnpack|--quantize) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 139

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[zingo]

Arm tests fail should be fixed now. I triggered a rebase to test.