🔁 Modernized index landing page

[JFWooten4]

No description provided.

[Copilot]

Pull request overview

Updates the Stellar Developer Docs landing page content and layout to a more modern introduction, including an embedded explainer video.

Changes:

• Replace the introductory copy with updated messaging.
• Remove the unused PathfindingTable import and add a YouTube embed to the homepage.
• Adjust the “developer docs” description copy (including “on- and off-ramps” wording).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[JFWooten4]

[ElliotFriend]

Thanks for this — there are three things in here I definitely want, and two I'm going to decline. Let me be specific so you can trim this to a fast merge.

Keep (please reduce the PR to these):

1. loading="lazy" on the YouTube component — nice catch, and it now benefits every meeting-note page using the component.
2. Removing the unused PathfindingTable import — confirmed dead on main.
3. The "on- and off-ramps" hyphenation fix — correct suspended hyphen.

Declining:

• The video embed: homepage content is curated with our DevRel/comms folks, and we're not adding a featured video right now. If you think one belongs there, an issue is the right venue so the right people can weigh in on which video and where.
• The intro prose rewrite: this is a voice call. The current phrasing ("will teach you...") is the tone we want on the landing page, and additions like "for everyone" read more marketing than docs. Keeping the original.

Strip it down to the three keepers and I'll merge it quickly. Thanks!