Update Component Library doc

[natemoo-re]

Updates the Component Library doc to reflect the new ownership of /stories and the new process for writing .mdx files.

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• Checked Vercel preview for correctness, including links
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[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
sentry-docs	Ready	Preview	Comment	Oct 2, 2025 10:13pm

1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
develop-docs	Ignored	Preview		Oct 2, 2025 10:13pm

[natemoo-re]

Hope it's alright to merge this without docs team approval since it's just dev docs 🙏

[codecov]

Bundle Report

Changes will decrease total bundle size by 15 bytes (-0.0%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-client-array-push	10.13MB	-6 bytes (-0.0%) ⬇️
sentry-docs-server-cjs	12.93MB	-9 bytes (-0.0%) ⬇️

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%
server/middleware-*.js	6.46kB	7.46kB	645.5% ⚠️
server/middleware-*.js	-6.46kB	1.0kB	-86.59%
static/_BcxBz_81IdwFws2V4KrB/_buildManifest.js (New)	684 bytes	684 bytes	100.0% 🚀
static/_BcxBz_81IdwFws2V4KrB/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% 🚀
static/39QDiPizDOrwKq7pvrEB_/_buildManifest.js (Deleted)	-684 bytes	0 bytes	-100.0% 🗑️
static/39QDiPizDOrwKq7pvrEB_/_ssgManifest.js (Deleted)	-77 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	1.78MB	-0.0%
../instrumentation.js	-3 bytes	1.1MB	-0.0%
9523.js	-3 bytes	1.08MB	-0.0%