docs(js): Create general Cloudflare Quick Start guide

[inventarSarah]

DESCRIBE YOUR PR

This PR contains the updated Cloudflare Quick Start guide (for general/non-framework setup).

I removed the parts about Durable Objects and Workflows (they were mostly links) and instead added a link to the Cloudflare-specific feature page in the Next Steps section. Let me know if you think it makes sense for the Quick Start Guide to add these removed parts back.

Note: I made small changes to the framework-specific guides -> they'll get a quick start guide update later in separate PRs.

Closes: #14484

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PRE-MERGE CHECKLIST

Make sure you've checked the following before merging your changes:

• Checked Vercel preview for correctness, including links
• PR was reviewed and approved by any necessary SMEs (subject matter experts)
• PR was reviewed and approved by a member of the Sentry docs team

EXTRA RESOURCES

• Sentry Docs contributor guide

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
sentry-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 11, 2025 7:10am

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
develop-docs	⬜️ Ignored (Inspect)	Visit Preview		Aug 11, 2025 7:10am

[codecov]

Bundle Report

Changes will decrease total bundle size by 20.04kB (-0.09%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-client-array-push	9.85MB	-6 bytes (-0.0%) ⬇️
sentry-docs-server-cjs	12.36MB	-20.03kB (-0.16%) ⬇️

Affected Assets, Files, and Routes:

view changes for bundle: sentry-docs-client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
static/chunks/pages/_app-*.js	-3 bytes	882.71kB	-0.0%
static/chunks/8321-*.js	-3 bytes	425.87kB	-0.0%
static/Do2m3z8FTjKPgLo-*.js (New)	684 bytes	684 bytes	100.0% 🚀
static/Do2m3z8FTjKPgLo-*.js (New)	77 bytes	77 bytes	100.0% 🚀
static/OyMpO1gIKXV2rF4F-*.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️
static/OyMpO1gIKXV2rF4F-*.js (Deleted)	-684 bytes	0 bytes	-100.0% 🗑️

view changes for bundle: sentry-docs-server-cjs

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.77MB	-0.0%
../instrumentation.js	-3 bytes	1.1MB	-0.0%
9523.js	-3 bytes	1.08MB	-0.0%
../app/[[...path]]/page.js.nft.json	-6.67kB	738.41kB	-0.9%
../app/platform-redirect/page.js.nft.json	-6.67kB	738.32kB	-0.9%
../app/sitemap.xml/route.js.nft.json	-6.67kB	735.79kB	-0.9%

[coolguyzone]

Thanks for adding, looks good!