feat: Vite cedarPgDev panel and status/studio CLI

[simoncrypta]

Summary

• Add cedarPgDev() Vite plugin on @cedarjs/pg/vite-plus: status panel on listen + shortcuts d (lease/DATABASE_URL) and p (Prisma/Drizzle Studio)
• Add cedarpg status / cedarpg studio and public resolveDevStatus / formatDevStatus for Nx and scripting
• Optional vite peer; plugin reads lease only (pair with existing db:acquire / cedarPgTasks())

Test plan

• vp check / vp test
• vp run smoke
• In a Vite+ app with plugins: [cedarPgDev()] and dependsOn: ['db:acquire'], confirm panel + d/p after listen
• cedarpg status --mode=dev and cedarpg studio --prisma against an acquired lease

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