feat(sveltekit)!: Remove unstable_sentryVitePluginOptions

[chargome]

Removes unstable_sentryVitePluginOptions from the SvelteKit plugin options.

Everything it exposed is reachable as a top-level build option. Adds a build-time warning for plain JS configs, where TypeScript cannot catch the removed key.

closes #23345

[linear-code]

JS-3361

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	30.3 kB	-	-
@sentry/browser - with treeshaking flags	28.47 kB	-	-
@sentry/browser - with treeshaking flags tracing without tracing	26.81 kB	-	-
@sentry/browser (incl. Tracing)	48.54 kB	-	-
@sentry/browser (incl. Tracing + Span Streaming)	48.55 kB	-	-
@sentry/browser (incl. Tracing, Profiling)	51.43 kB	-	-
@sentry/browser (incl. Tracing, Replay)	87.94 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	77.32 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	92.67 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	105.36 kB	-	-
@sentry/browser (incl. Feedback)	47.65 kB	-	-
@sentry/browser (incl. sendFeedback)	35.13 kB	-	-
@sentry/browser (incl. FeedbackAsync)	40.28 kB	-	-
@sentry/browser (incl. Metrics)	31.24 kB	-	-
@sentry/browser (incl. Logs)	31.52 kB	-	-
@sentry/browser (incl. Metrics & Logs)	32.15 kB	-	-
@sentry/react	32.09 kB	-	-
@sentry/react (incl. Tracing)	50.73 kB	-	-
@sentry/vue	35.31 kB	-	-
@sentry/vue (incl. Tracing)	50.5 kB	-	-
@sentry/svelte	30.33 kB	-	-
CDN Bundle	31.61 kB	-	-
CDN Bundle (incl. Tracing)	48.87 kB	-	-
CDN Bundle (incl. Logs, Metrics)	33.8 kB	-	-
CDN Bundle (incl. Tracing, Logs, Metrics)	50.79 kB	-	-
CDN Bundle (incl. Replay, Logs, Metrics)	74.31 kB	-	-
CDN Bundle (incl. Tracing, Replay)	86.46 kB	-	-
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)	88.29 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback)	92.16 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)	94.11 kB	-	-
CDN Bundle - uncompressed	93.84 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	146.72 kB	-	-
CDN Bundle (incl. Logs, Metrics) - uncompressed	100.14 kB	-	-
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed	152.41 kB	-	-
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed	229.08 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	265.98 kB	-	-
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed	271.65 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	279.68 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed	285.34 kB	-	-
@sentry/nextjs (client)	53.26 kB	-	-
@sentry/sveltekit (client)	48.96 kB	-	-
@sentry/core/server	65.34 kB	-	-
@sentry/core/browser	51.69 kB	-	-
@sentry/node	117.67 kB	+0.01%	+1 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection)	0 B	added	added
@sentry/node - without tracing	82.06 kB	-0.01%	-1 B 🔽
@sentry/aws-serverless	91.47 kB	-	-
@sentry/cloudflare (withSentry) - minified	213.99 kB	-	-
@sentry/cloudflare (withSentry)	528.78 kB	-	-

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[chargome]

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[chargome]

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[Lms24]

nice!