[metadata] Extend pyproject.toml metadata

[tomaarsen]

Hello!

Pull Request overview

• Extend pyproject.toml metadata:
  • Ensure Nils's name is visible on pypi.org and not just in the METADATA file.
  • Replace the full Apache 2.0 license with just the name "Apache 2.0" (which pypi.org also understands)
  • Description from "Multilingual text embeddings" to "State-of-the-Art Text Embeddings"

Details

This correctly puts @nreimers back as one of the Authors on pypi.org. This wasn't shown for the 3.1.0 release.
For some reason, if the pyproject.toml contains

authors = [
    { name = "Nils Reimers", email = "info@nils-reimers.de" },
    { name = "Tom Aarsen" },
]

Then this'll compile to:

Author: Tom Aarsen
Author-email: Nils Reimers <info@nils-reimers.de>

which pypi.org for some reason parses as 1 Author (Tom Aarsen) with 1 email (info@nils-reimers.de). If I add my own email, then it becomes:

Author-email: Nils Reimers <info@nils-reimers.de>, Tom Aarsen <tom.aarsen@huggingface.co>

and no Author:. This will still get parsed as just one Author by pypi.org... Except then it does link the correct email. I've also added myself as a maintainer, so we'll get:

Author-email: Tom Aarsen <tom.aarsen@huggingface.co>, Nils Reimers <info@nils-reimers.de>
Maintainer-email: Tom Aarsen <tom.aarsen@huggingface.co>

You can see what this becomes below. I'd rather just have 2 authors listed, but I can't seem to get that to work: the core metadata seems to only allow one author and one maintainer: https://packaging.python.org/en/latest/specifications/core-metadata/#author

Before

After

• Tom Aarsen