feat: Create plugin http guide

[vasfvitor]

What kind of changes does this PR include?

• New or updated content

Description

• Closes Create HTTP Client guide #1480
• Bit of context about Rust part https://discord.com/channels/616186924390023171/662624589037436928/1177657907131727952

What about the line highlight? For this and other guides
Current:
/\\.plugin.*$/

Another ways:
{6}

ins=/\\.plugin.*$/

ins={6}

there may be more ways, not sure, reference: https://starlight.astro.build/guides/authoring-content/#expressive-code-features

[netlify]

✅ Deploy Preview for tauri-docs-starlight ready!

Name	Link
🔨 Latest commit	a01ac18
🔍 Latest deploy log	https://app.netlify.com/sites/tauri-docs-starlight/deploys/65817e2b490ae80008e31041
😎 Deploy Preview	https://deploy-preview-1725--tauri-docs-starlight.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 100 (no change from production) Accessibility: 100 (no change from production) Best Practices: 100 (no change from production) SEO: 92 (no change from production) PWA: - View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[lorenzolewis]

I prefer using line numbers to highlight I think. That's what's most common and I've seen in other places so I think it will be easier for contributors to understand (especially since what's being highlighted is a full line and not just a word or two).

[lorenzolewis]

Just a few changes here then it's good to go!

[lorenzolewis]

Thanks @vasfvitor ! Just added a link to the Fetch API and the rest is good to go!