feat(browser): Experimental Soft Navigation Support

[logaretm]

This PR implements soft navigation support which is pulled from https://github.com/GoogleChrome/web-vitals/pull/308 which entered recently origin trials.

No plans yet to support this in our product, just experimenting with how it works once I submit a suitable origin to test out.

Links:

• https://developer.chrome.com/docs/web-platform/soft-navigations-experiment
• https://developer.chrome.com/blog/new-soft-navigations-origin-trial

[linear[bot]]

JS-1019 Investigate and Experiment with soft navigation web vitals

[github-actions[bot]]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	24.8 kB	-	-
@sentry/browser - with treeshaking flags	23.31 kB	-	-
⛔️ @sentry/browser (incl. Tracing) (max: 42 kB)	42.35 kB	+1.96%	+814 B 🔺
@sentry/browser (incl. Tracing, Profiling)	47.02 kB	+1.91%	+881 B 🔺
⛔️ @sentry/browser (incl. Tracing, Replay) (max: 80 kB)	80.77 kB	+1.03%	+816 B 🔺
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	70.49 kB	+1.15%	+801 B 🔺
⛔️ @sentry/browser (incl. Tracing, Replay with Canvas) (max: 85 kB)	85.46 kB	+0.98%	+825 B 🔺
⛔️ @sentry/browser (incl. Tracing, Replay, Feedback) (max: 97 kB)	97.69 kB	+0.84%	+811 B 🔺
@sentry/browser (incl. Feedback)	41.48 kB	-	-
@sentry/browser (incl. sendFeedback)	29.49 kB	-	-
@sentry/browser (incl. FeedbackAsync)	34.47 kB	-	-
@sentry/react	26.52 kB	-	-
⛔️ @sentry/react (incl. Tracing) (max: 44 kB)	44.6 kB	+1.98%	+865 B 🔺
@sentry/vue	29.25 kB	-	-
⛔️ @sentry/vue (incl. Tracing) (max: 44 kB)	44.17 kB	+1.93%	+834 B 🔺
@sentry/svelte	24.82 kB	-	-
CDN Bundle	27.21 kB	-	-
⛔️ CDN Bundle (incl. Tracing) (max: 42.5 kB)	43.05 kB	+1.98%	+832 B 🔺
CDN Bundle (incl. Tracing, Replay)	79.58 kB	+1.07%	+835 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback)	85.07 kB	+1.04%	+869 B 🔺
CDN Bundle - uncompressed	79.96 kB	-	-
⛔️ CDN Bundle (incl. Tracing) - uncompressed (max: 127 kB)	128.33 kB	+2.39%	+2.99 kB 🔺
CDN Bundle (incl. Tracing, Replay) - uncompressed	244.36 kB	+1.24%	+2.99 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	257.12 kB	+1.18%	+2.99 kB 🔺
⛔️ @sentry/nextjs (client) (max: 46 kB)	46.8 kB	+1.83%	+839 B 🔺
⛔️ @sentry/sveltekit (client) (max: 42 kB)	42.73 kB	+1.99%	+832 B 🔺
@sentry/node-core	51.27 kB	-	-
@sentry/node	159.43 kB	-0.01%	-4 B 🔽
@sentry/node - without tracing	92.85 kB	-	-
@sentry/aws-serverless	108.14 kB	-	-

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