Audit and update the pip package metadata

[dbort]

Fill out the recommended project keys, most of which will affect the web page that PyPI will render for the executorch package.

See https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#about-your-project for the latest guidance.

Use https://github.com/pytorch/pytorch/blob/a21327e0b03cc18850a0608be2d9c5bd38fd4646/setup.py#L1394 as a guide for the actual values.

Add a README-wheel.md file that will be included in the wheel, and will become the main page contents on PyPI.

Test Plan:

• Installed the package with ./install_requirements.sh
• Looked at the files under ~/miniconda3/envs/executorch/lib/python3.10/site-packages/executorch-0.2.0a0+1a499e0.dist-info. METADATA and LICENSE both contain the new metadata.

[pytorch-bot[bot]]

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/3265

• :page_facing_up: Preview Python docs built from this PR

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

:x: 1 New Failure

As of commit 2a894162970da4dddb1db1c360d42a391a052fc6 with merge base d3326a2073dee7baf78044fb3afd0772edbc616a ():

NEW FAILURE - The following job has failed:

• Lint / lintrunner / linux-job (gh) >>> Lint for sdk/inspector/tests/inspector_test.py:

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

[guangy10]

There are bunch of CI failures you will need to look into. Please ensure it's addressed before merging

[dbort]

@guangy10 doh, the torch==2.3 is breaking assumptions in the CI environment. This is the requirement that we need when we release, but right now it can't be fulfilled.

I updated this PR to only touch the metadata without adding that dependency line. I'll need to modify the CI scripts to make this work.

[dbort]

I'm not sure why the lint job is failing. Some of the suggestions it's giving look wrong, and I don't see those same suggestions when running locally. I'm re-running the job to see if it was temporary.

EDIT: It was because of the new "python >=3.10" requirement. There's a new with syntax in 3.10+ that the linter started enforcing. https://github.com/pytorch/executorch/pull/3277 will remove the >=3.10 since we do actually want to try supporting older versions at some point

[dbort]

Trying to reinstate the torch==2.3 dependency in https://github.com/pytorch/executorch/pull/3277

[guangy10]

Yeah, this PR doesn't even touch those files.