chore(docs): add Elva partner + logo

[dreamorosi]

Description of your changes

This quick PR adds an additional customer reference that was just submitted by Elva Group to the docs and to the README files.

Once merged the PR will close #1426.

Note
The docs will be in staging till the next release, so the new section won't be visible just yet.

Related issues, RFCs

Issue number: #1426

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding changes to the examples
• My changes generate no new warnings
• The code coverage hasn't decreased
• I have added tests that prove my change is effective and works
• New and existing unit tests pass locally and in Github Actions
• Any dependent changes have been merged and published
• The PR title follows the conventional commit semantics

Breaking change checklist

Is it a breaking change?: NO

• I have documented the migration process
• I have added, implemented necessary warnings (if it can live side by side)

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[leandrodamascena]

Hei @dreamorosi
I don't know if you are working on this fix, but I saw this PR and GitHub cannot render the {target="_blank"} tag in the README files.

[dreamorosi]

You're right, thanks for letting me know!

I'll fix this tomorrow morning

[dreamorosi]

Opened an issue so I don't forget #1428