v0.2.0 — Canonical-template README pass

Docs-only release. The README was rewritten so the repo reads as a canonical template rather than a personal project. No runtime or behavior changes.

Changed

• Title → "Cloudflare SaaS Template" (aligns with the package, docs site, and v0.1.0 release).
• Lede reframed; reference-deployment URLs explicitly labeled so it's clear they're the maintainer's instance.
• Project Layout block fixed — replaced the stale Docusaurus description with the actual docs/ shape (React + Mantine + MDX).
• Tech Stack picked up rows for Polar, Tabler icons, Nunito, and a CI row.
• Node prerequisite bumped 20 → 22 (Wrangler 4 + CI already require it).
• CLOUDFLARE_ACCOUNT_ID example genericized — wrangler whoami rather than a literal account.
• Auth section now points at docs/src/content/customizing.mdx as a fallback so forks without a deployed docs URL still have a working pointer.
• npm overrides note expanded to cover both root and docs/ pins.

Added

• "What's inside" feature summary above the Tech Stack table — 9 bullets for fast scanning.
• "Docs site" section documenting the docs-as-a-Worker pattern and npm run docs:dev / docs:build / docs:deploy.
• "Releases" section linking GitHub Releases + CHANGELOG with Keep a Changelog / SemVer attribution.
• Release + Changelog badges next to the Deploy-to-Cloudflare button.

Full diff

v0.1.0...v0.2.0 — three commits, all under README.md / CHANGELOG.md.