[pages] Add wrangler pages config download

[penalosa]

What this PR solves / how to test

Adds a Wrangler command to support downloading a Pages project's config into a wrangler.toml file

Fixes DEVX-1178

Author has addressed the following

• Tests
  • TODO (before merge)
  • Included
  • Not necessary because:
• Changeset (Changeset guidelines)
  • TODO (before merge)
  • Included
  • Not necessary because:
• Public documentation
  • TODO (before merge)
  • Cloudflare docs PR(s): https://github.com/cloudflare/cloudflare-docs/pull/...
  • Not necessary because: Docs will be coming soon

[changeset-bot]

🦋 Changeset detected

Latest commit: b5deb07

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

This PR includes changesets to release 2 packages

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

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[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/8392679488/npm-package-wrangler-5327

You can reference the automatically updated head of this PR with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/5327/npm-package-wrangler-5327

Or you can use npx with this latest build directly:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/8392679488/npm-package-wrangler-5327 dev path/to/script.js

Additional artifacts:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/8392679488/npm-package-create-cloudflare-5327 --no-auto-update

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/8392679488/npm-package-cloudflare-kv-asset-handler-5327

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/8392679488/npm-package-miniflare-5327

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/8392679488/npm-package-cloudflare-pages-shared-5327

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/8392679488/npm-package-cloudflare-vitest-pool-workers-5327

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

---

wrangler@3.37.0 includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20240320.0
workerd	1.20240320.1	1.20240320.1
workerd --version	1.20240320.1	2024-03-20

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

[codecov]

Codecov Report

Attention: Patch coverage is 96.66667% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 72.39%. Comparing base (00820be) to head (b5deb07).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5327      +/-   ##
==========================================
+ Coverage   72.16%   72.39%   +0.22%     
==========================================
  Files         317      318       +1     
  Lines       16372    16458      +86     
  Branches     4169     4201      +32     
==========================================
+ Hits        11815    11914      +99     
+ Misses       4557     4544      -13     

Files	Coverage Δ
packages/wrangler/src/metrics/send-event.ts	100.00% <ø> (ø)
packages/wrangler/src/pages/build.ts	67.41% <ø> (ø)
packages/wrangler/src/pages/errors.ts	42.10% <100.00%> (+3.21%)	⬆️
packages/wrangler/src/pages/index.ts	86.20% <100.00%> (+1.59%)	⬆️
packages/wrangler/src/pages/download-config.ts	98.61% <98.61%> (ø)
packages/wrangler/src/pages/build-env.ts	90.47% <84.61%> (-9.53%)	⬇️

... and 8 files with indirect coverage changes

[CarmenPopoviciu]

what is this for?

[penalosa]

This is for integration with CI—perhaps it shouldn't be in this PR