refactor: Ensure that unstable type exports are all prefixed with Unstable_ rather than just Unstable

[petebacondarwin]

Fixes #0000

We use unstable_ as a prefix for experimental/unstable functions, but we were using just Unstable without the underscore as a prefix for types.

This change ensures that all unstable type exports are prefixed with Unstable_ rather than just Unstable.

---

• Tests
  • TODO (before merge)
  • Tests included
  • Tests not necessary because:
• E2E Tests CI Job required? (Use "e2e" label or ask maintainer to run separately)
  • I don't know
  • Required
  • Not required because:
• Public documentation
  • TODO (before merge)
  • Cloudflare docs PR(s):
  • Documentation not necessary because: refactor

[changeset-bot]

🦋 Changeset detected

Latest commit: 5771e27

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
wrangler	Patch
@cloudflare/vitest-pool-workers	Patch

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[github-actions]

A wrangler prerelease is available for testing. You can install this latest build in your project with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12181816570/npm-package-wrangler-7454

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npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/7454/npm-package-wrangler-7454

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npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12181816570/npm-package-create-cloudflare-7454 --no-auto-update

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12181816570/npm-package-cloudflare-kv-asset-handler-7454

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npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12181816570/npm-package-cloudflare-vitest-pool-workers-7454

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12181816570/npm-package-cloudflare-workers-editor-shared-7454

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12181816570/npm-package-cloudflare-workers-shared-7454

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Note that these links will no longer work once the GitHub Actions artifact expires.

---

wrangler@3.92.0 includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20241106.2
workerd	1.20241106.2	1.20241106.2
workerd --version	1.20241106.2	2024-11-06

Please ensure constraints are pinned, and miniflare/workerd minor versions match.