docs(toolbar): Update @sentry/toolbar docs to include help for CSP issues

[ryan953]

New content look like this:

Related to getsentry/sentry#93206
Related to https://github.com/getsentry/sentry-options-automator/pull/4119

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
sentry-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 10, 2025 4:24am

2 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
changelog	⬜️ Ignored (Inspect)			Jun 10, 2025 4:24am
develop-docs	⬜️ Ignored (Inspect)			Jun 10, 2025 4:24am

[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-server-cjs	10.86MB	-9 bytes (-0.0%) ⬇️
sentry-docs-client-array-push	9.77MB	-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	1.63MB	-0.0%
../instrumentation.js	-3 bytes	957.45kB	-0.0%
9523.js	-3 bytes	933.5kB	-0.0%

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	873.24kB	-0.0%
static/chunks/7750-*.js	-3 bytes	401.83kB	-0.0%
server/middleware-*.js	5.55kB	6.55kB	555.3% ⚠️
server/middleware-*.js	-5.55kB	1.0kB	-84.74%
static/vvttXX5RrFfEFNp2fzeyF/_buildManifest.js (New)	616 bytes	616 bytes	100.0% 🚀
static/vvttXX5RrFfEFNp2fzeyF/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% 🚀
static/0CXDODBn6JFg5UJIV1w3S/_buildManifest.js (Deleted)	-616 bytes	0 bytes	-100.0% 🗑️
static/0CXDODBn6JFg5UJIV1w3S/_ssgManifest.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️