C3: Detect production branch when creating pages project

[jculvey]

Fixes #3637.

What this PR solves / how to test:

This fixes an issue where pages project will fail to be created properly if the user has a different default branch name configured other than main. That's because the production branch is currently hardcoded. This fixes it by detecting the current branch and passing that along to wrangler pages project create.

Associated docs issue(s)/PR(s):

• [insert associated docs issue(s)/PR(s)]

Author has included the following, where applicable:

• Tests
• [ x ] 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

[changeset-bot]

🦋 Changeset detected

Latest commit: cb9f8ac

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	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/5612709932/npm-package-wrangler-3644

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

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/3644/npm-package-wrangler-3644

Or you can use npx with this latest build directly:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/5612709932/npm-package-wrangler-3644 dev path/to/script.js

Additional artifacts:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/5612709932/npm-package-cloudflare-pages-shared-3644

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

[codecov]

Codecov Report

Merging #3644 (1aabdb0) into main (f7ae0ea) will increase coverage by 0.04%.
The diff coverage is n/a.

❗ Current head 1aabdb0 differs from pull request most recent head cb9f8ac. Consider uploading reports for the commit cb9f8ac to get more accurate results

@@            Coverage Diff             @@
##             main    #3644      +/-   ##
==========================================
+ Coverage   75.19%   75.24%   +0.04%     
==========================================
  Files         190      190              
  Lines       11161    11161              
  Branches     2944     2944              
==========================================
+ Hits         8393     8398       +5     
+ Misses       2768     2763       -5     

see 3 files with indirect coverage changes

[RamIdeas]

What happens if the user chose to not use git? Will the default main still work or should we throw a better error than the potential crash would?

[petebacondarwin]

Pages needs a "production branch" even if git isn't used (e.g. for direct uploads). It is used as a tag for the production environment. So I think this is OK.
We should move this return statement inside the catch block, though, rather than having an empty catch block.

[jculvey]

It'll default to the current behavior. We need to supply a --productionBranch argument to the pages create command, otherwise the call to wrangler pages project create will fail when it demands interactive input.

[RamIdeas]

minor suggestions