[mxfp8] update readme with mxfp8 moe training prototype and mxfp8 training blog

[danielvegamyhre]

No description provided.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/ao/3207

• 📄 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:

• AWS was down, GHA infrastructure effected / recovering

❌ 1 New Failure, 1 Cancelled Job, 9 Pending

As of commit f22a05b with merge base d1a7fbc ():

NEW FAILURE - The following job has failed:

• Run Regression Tests (aarch64) / test-cpu-ops (macos-14) (gh)
  /Users/runner/miniconda3/envs/venv/lib/python3.10/site-packages/executorch/share/cmake/../../include/executorch/runtime/core/memory_allocator.h:143:21: error: no matching function for call to 'mul_overflows'

CANCELLED JOB - The following job was cancelled. Please retry:

• Run Regression Tests (aarch64) / test-cpu-ops (linux.arm64.2xlarge) (gh)

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