## Summary
Fixes the duplicate logo issue on NPM and PyPI caused by #1462. The
`#gh-light-mode-only` / `#gh-dark-mode-only` URL fragments are
GitHub-specific — NPM and PyPI ignore them and render both `<img>` tags.
Switches all three package READMEs (CLI, JS SDK, Python SDK) to
`<picture>` elements:
```html
<picture>
<source media="(prefers-color-scheme: dark)" srcset=".../logo-white.png">
<source media="(prefers-color-scheme: light)" srcset=".../logo-black.png">
<img alt="E2B Logo" src=".../logo-black.png" width="200">
</picture>
```
- **GitHub**: `<picture>` + `prefers-color-scheme` handles theme
switching
- **NPM/PyPI**: `<picture>` not supported, falls back to the single
`<img>` (black logo)
Link to Devin session:
https://app.devin.ai/sessions/4983f23d23934d2c9a51733f5f9920f3
Requested by: @mlejva
---------
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: vasek <vasek.mlejnsky@gmail.com>
devin-ai-integration[bot]
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