Add openapi template to create cloudflare

[G4brym]

What this PR solves / how to test:
Adds a OpenAPI 3.1 template to create cloudflare package

Author has included the following, where applicable:

• Tests
• Changeset (Changeset guidelines)

Reviewer is to perform the following, as applicable:

• Checked for inclusion of relevant tests
• Checked for inclusion of a relevant changeset
• Checked for creation of associated docs updates
• Manually pulled down the changes and spot-tested

Note for PR author:

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[changeset-bot]

🦋 Changeset detected

Latest commit: d4f7d39

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

This PR includes changesets to release 1 package

Name	Type
create-cloudflare	Minor

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/6120532076/npm-package-wrangler-3887

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

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/6120532076/npm-package-wrangler-3887

Or you can use npx with this latest build directly:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/6120532076/npm-package-wrangler-3887 dev path/to/script.js

Additional artifacts:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/6120532076/npm-package-cloudflare-pages-shared-3887

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

---

wrangler@3.7.0 includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	3.20230904.0	3.20230904.0
workerd	1.20230904.0	1.20230904.0
workerd --version	1.20230904.0	2023-09-04

|

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

[codecov]

Codecov Report

Merging #3887 (d4f7d39) into main (a986f19) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3887      +/-   ##
==========================================
+ Coverage   75.10%   75.12%   +0.02%     
==========================================
  Files         195      195              
  Lines       11487    11487              
  Branches     3036     3036              
==========================================
+ Hits         8627     8630       +3     
+ Misses       2860     2857       -3     

see 2 files with indirect coverage changes

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