docs: Add documentation page for experimental support

[Kai-ros]

Overview

Implemented nested page structure to improve page appearance and organization and added 4 pages to the docs site.

Callouts

• This resolves #54
• I am hoping these changes are sufficiently minimal but if I took things too far then I'm happy to split them out.
• I tried my best to come to the necessary understanding of the code to describe it, but I am NOT an expert on Cloudflare Workers nor Service Workers, so please, be ruthless in your edits. Ready and willing to extend the explanations as requested!

Changes

• General - Strove to maintain the existing sentiment and messaging of the docs while also improving consistency and clarity. Hopefully the necessary balance between detail and concision was struck. Also, fixed some grammar errors as I encountered them.

• Getting Started Page - New page to focus solely on a minimal startup.

• Why srvx? Page - New page to better explain the why for the library.

• Experimental Support Page - New page explaining Cloudflare and Service Worker adapters.

• Plugins Page - New page holding space for future Plugin details.

• Nesting Structure - I took direct inspiration from the h3.dev site's nested navigation sidebar.

Before:

After:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

📢 Thoughts on this report? Let us know!