[website] Separate section to keep multimedia content

[MehulBatra]

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• I searched in the issues and found nothing similar.

Description

we add a separate Videos/Podcasts section on the website to better organize our multimedia resources, including Summit presentations, webinars, and tutorial videos. This would follow the same pattern as our existing blog section

Willingness to contribute

• I'm willing to submit a PR!

[wuchong]

How about adding a "Learn" dropdown list after "Blog" with "Talks" and "Videos" in it? Like how Hudi does: https://hudi.apache.org/

[MehulBatra]

Yes, this looks perfect! In the future, we could keep adding new categories.