JavaScript tracing docs refactor

[codyde]

DESCRIBE YOUR PR

Refactoring of tracing docs within JavaScript to provide additional clarity on distributed tracing, span metrics, and configuring custom spans. This PR includes changes to the nav structure, and introduces a new nav that will be replicated across other SDKs once we've finished reviewing the potential changes.

IS YOUR CHANGE URGENT?

Help us prioritize incoming PRs by letting us know when the change needs to go live.

• Other deadline: 2/28

EXTRA RESOURCES

• Sentry Docs contributor guide

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
sentry-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 3, 2025 6:39pm

2 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
changelog	⬜️ Ignored (Inspect)	Visit Preview		Mar 3, 2025 6:39pm
develop-docs	⬜️ Ignored (Inspect)	Visit Preview		Mar 3, 2025 6:39pm

[codecov]

Bundle Report

Changes will increase total bundle size by 171 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-server-cjs	10.2MB	177 bytes (0.0%) ⬆️
sentry-docs-client-array-push	9.39MB	-6 bytes (-0.0%) ⬇️

Affected Assets, Files, and Routes:

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

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.46MB	-0.0%
../instrumentation.js	-3 bytes	791.26kB	-0.0%
9523.js	-3 bytes	767.46kB	-0.0%
../app/[[...path]]/page.js.nft.json	62 bytes	382.57kB	0.02%
../app/platform-redirect/page.js.nft.json	62 bytes	382.49kB	0.02%
../app/sitemap.xml/route.js.nft.json	62 bytes	380.46kB	0.02%

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	868.04kB	-0.0%
static/chunks/4028-*.js	-3 bytes	393.29kB	-0.0%
server/middleware-*.js	5.55kB	6.55kB	555.3% ⚠️
server/middleware-*.js	-5.55kB	1.0kB	-84.74%
static/CbipRJ2B2REqsJNH5V9Mq/_buildManifest.js (New)	578 bytes	578 bytes	100.0% 🚀
static/CbipRJ2B2REqsJNH5V9Mq/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% 🚀
static/WJDU6PZjivZCfnFcN9K3e/_buildManifest.js (Deleted)	-578 bytes	0 bytes	-100.0% 🗑️
static/WJDU6PZjivZCfnFcN9K3e/_ssgManifest.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️