docs: updating logos

[Borda]

What does this PR do?

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cc @Borda @carmocca @justusschock @awaelchli

[github-actions]

⚡ Required checks status: All passing 🟢

Groups summary

🟢 fabric: Docs

Check ID	Status
docs-checks (fabric, doctest)	success	✅
make-html (fabric)	success	✅

These checks are required after the changes to docs/source-fabric/_static/images/logo.png, docs/source-fabric/_static/images/logo.svg, .github/workflows/docs-build.yml.

🟢 pytorch_lightning: Docs

Check ID	Status
docs-checks (pytorch, doctest)	success	✅
make-html (pytorch)	success	✅

These checks are required after the changes to docs/source-pytorch/_static/images/logo.png, docs/source-pytorch/_static/images/logo.svg, .github/workflows/docs-build.yml.

🟢 lightning_app: Docs

Check ID	Status
docs-checks (app, doctest)	success	✅
make-html (app)	success	✅

These checks are required after the changes to docs/source-app/_static/images/logo.png, docs/source-app/_static/images/logo.svg, .github/workflows/docs-build.yml.

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[awaelchli]

The texts are much smaller than before, and the subtitle "Created by Lightning AI" appears tiny on the generated website. Is this intentional?

[lantiga]

BTW it seems the new images have a different logos

[Borda]

The texts are much smaller than before, and the subtitle "Created by Lightning AI" appears tiny on the generated website. Is this intentional?

@alexlouiserose @likethecognac ^^

it seems the new images have a different logos

It seems we did not update it for a while...

[Borda]

this is how the docs will look like: https://pytorch-lightning--18375.org.readthedocs.build/en/18375/

[likethecognac]

yes, had called out the small copy size myself ,when we first added the byline, but it was intentionally on the smaller side. fwiw it's called micro in our design system and to be used sparingly. are you inserting that updated image into the same sized div? The added byline may be making it not fit into the original space as easily. here's a mock to share what is expected

@lantiga yes, the original icon (logo) and wordmark (brand text) was actually one typeface and a different custom wordmark for "lighting", so those two aren't even the same font. Keeping the sub brands in a more easily changeable format for now to more easily update for things like lit-LLaMA > Llama , or addign spaces or changing lit-parrot > GPT, etc.

[awaelchli]

We would need to slightly adjust the size to fit what is expected as pointed out by @likethecognac. If this is not controllable here in lightning, it might need adjustment in the docs template.

[Borda]

I believe we need to update this CSS to set some higher max size but preserve max-width:
https://github.com/Lightning-Universe/lightning_sphinx_theme/blob/2c040181e16bcfcf98a1c3d7fcc92ecfa984c7e1/scss/shared/_navigation.scss#L34
cc: @adamjkuhn

[carmocca]

Low confidence on the logo changes. Approving to unblock