docs(compute): add monorepo deployment guide

[AmanVarshney01]

Summary

• add a user-facing guide for configuring and deploying multiple Compute apps from one monorepo
• document per-target builds, directory inference, deploy-all behavior, failure handling, and GitHub fan-out
• correct the CI example to select prisma.compute.ts targets positionally and use non-conflicting project/auth environment variables
• centralize the monorepo workflow on the new guide and replace duplicate examples across Configuration, GitHub, FAQ, limitations, CLI reference, and the main deploy guide with contextual links
• add the guide to the Compute navigation

Why

The configuration reference described multi-app targets, but developers did not have an end-to-end workflow showing where the root config belongs, how to verify each app, or how single-target and all-target deploys differ. The same workflow was also repeated across several pages, making it easier for examples to drift. This change gives the workflow one canonical home and links to it from related reference and onboarding pages.

Verification

• manually built Next.js and Hono targets with @prisma/cli@3.0.0-beta.28
• verified target inference and served the Hono target locally through app run
• verified the detailed apps config and positional target commands are centralized on the monorepo page
• pnpm --filter @prisma/cli test -- compute-config.test.ts deploy-plan.test.ts app-local-dev.test.ts app-build.test.ts
• bun test sdk/test/config.test.ts sdk/test/workspace.test.ts sdk/test/nextjs-build.test.ts
• pnpm --filter @pdp/build-runner test --run e2b/resolveStrategy.test.ts build-jobs/fanOutMultiAppBuild.test.ts
• pnpm --filter docs types:check
• pnpm --filter docs lint:links
• targeted CSpell on the changed Compute docs

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Project	Deployment	Actions	Updated (UTC)
blog	Ready	Preview, Comment	Jul 16, 2026 11:47am
docs	Ready	Preview, Comment	Jul 16, 2026 11:47am
eclipse	Ready	Preview, Comment	Jul 16, 2026 11:47am
site	Ready	Preview, Comment	Jul 16, 2026 11:47am

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Build	Status	Details	Updated (UTC)
default (Inspect)	✅ No changes detected	-	Jul 16, 2026, 11:52 AM