user-facing homepage updates

[JessicaS11]

Updates the user-facing homepage for the earthaccess docs.

Motivated by creating a mockup of how we might better acknowledge contributors and supporters (including financial support), these updates aim to make the front page of our docs more welcoming to users. It incorporates edits from @jules32 and @amfriesz initiated in #899.

Pull Request (PR) draft checklist - click to expand

• Please review our
  contributing documentation
  before getting started.
• Populate a descriptive title. For example, instead of "Updated README.md", use a
  title such as "Add testing details to the contributor section of the README".
  Example PRs: #763
• Populate the body of the pull request with:
  • A clear description of the change you are proposing.
  • Links to any issues resolved by this PR with text in the PR description, for
    example closes #1. See
    GitHub docs - Linking a pull request to an issue.
• Update CHANGELOG.md with details about your change in a section titled
  ## Unreleased. If such a section does not exist, please create one. Follow
  Common Changelog for your additions.
  Example PRs: #763
• Update the documentation and/or the README.md with details of changes to the
  earthaccess interface, if any. Consider new environment variables, function names,
  decorators, etc.

Click the "Ready for review" button at the bottom of the "Conversation" tab in GitHub
once these requirements are fulfilled. Don't worry if you see any test failures in
GitHub at this point!

Pull Request (PR) merge checklist - click to expand

Please do your best to complete these requirements! If you need help with any of these
requirements, you can ping the @nsidc/earthaccess-support team in a comment and we
will help you out!

• Add unit tests for any new features.
• Apply formatting and linting autofixes. You can add a GitHub comment in this Pull
  Request containing "pre-commit.ci autofix" to automate this.
• Ensure all automated PR checks (seen at the bottom of the "conversation" tab) pass.
• Get at least one approving review.

---

📚 Documentation preview 📚: https://earthaccess--976.org.readthedocs.build/en/976/

[github-actions]

👈 Launch a binder notebook on this branch for commit c5bc9fc

I will automatically update this comment whenever this PR is modified

👈 Launch a binder notebook on this branch for commit bf843d1

👈 Launch a binder notebook on this branch for commit 8f84f4a

👈 Launch a binder notebook on this branch for commit 29caa50

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👈 Launch a binder notebook on this branch for commit dd5b91c

[JessicaS11]

This PR still needs:

• logos for ASDC, GESDISC, OBDAAC (none of them have clear/obvious logos on their websites)
• adding of new about_us.md page to the docs somewhere (the file exists but is not in the TOC or anything)

[JessicaS11]

pre-commit.ci autofix

[jules32]

Awesome work @JessicaS11 !!
@danielfromearth, @itcarroll, @battistowx, would you be able to point to or provide logos?

[itcarroll]

pre-commit.ci autofix

[jules32]

Hi! Here is GES DISC's logo (thank you Alexis!); I wasn't able to commit it to this branch. It is already listed in index.md so it only needs to be saved as docs/logos/gesdisc-logo.png if someone is able to do that. Then maybe we can merge this? Thank you!

[mfisher87]

Aside from the logo, does this feel ready to review?

[jules32]

Yes please! Thank you!

[mfisher87]

Can't promise I'll get to it in the short-term; sprinting for a workshop next week! Marking it ready for review will help me remember when I do find a moment :)