Delete broken link and pages that nobody views

[germainelee]

Fixes owncast/owncast#4278

• According to data from plausible, very few people clicks on See how others are using Owncast and what they're saying.. So we should probably just remove it.

fixes owncast/owncast#4264

• See reason: Documentation broken link: https://www.fediverse.to/ owncast#4264 (comment)

[Copilot]

Pull Request Overview

This PR removes a broken blog link from the main layout and deletes pages that have low user engagement, while also making a minor formatting update in the social documentation.

• Removed the "See how others are using Owncast and what they're saying." link from layouts/index.html.
• Deleted unused content from content/examples/projects.md and content/examples/blogs-tutorials.md.
• Reformatted the YAML array and removed an extraneous link from content/docs/social.md.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
layouts/index.html	Removed the broken link to the blogs-tutorials page.
content/examples/projects.md	Deleted unused projects example content.
content/examples/blogs-tutorials.md	Deleted the rarely viewed blogs and tutorials page content.
content/docs/social.md	Reformatted tags section and removed an extraneous link.

[germainelee]

Copilot writes better PR descriptions than me OTL. It clearly explains what I've done and why I've done it.