feat: [experimental] prefetch pageContext (#246) #11168

Job	Run time
prepare	9s
Vitest (unit tests) - Ubuntu - Node.js 18	41s
Vitest (E2E tests) - Ubuntu - Node.js 18	42s
TypeScript - Ubuntu - Node.js 18	1m 31s
Boilerplates - Ubuntu - Node.js 18	1m 41s
Examples React - Ubuntu - Node.js 20	11m 0s
Examples React - Win - Node.js 18	18m 46s
Examples Vue/Others - Ubuntu - Node.js 20	9m 1s
Examples Vue/Others - Win - Node.js 18	16m 18s
Examples Misc - Ubuntu - Node.js 18	1m 38s
Examples Misc - Mac - Node.js 18	2m 37s
Examples Misc - Win - Node.js 18	2m 44s
Unit Tests E2E - Ubuntu - Node.js 20	2m 33s
Unit Tests E2E - Win - Node.js 18	4m 46s
Cloudflare - Ubuntu - Node.js 20	54s
https://vike.dev - Ubuntu - Node.js 20	57s
	1h 15m 58s

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