feat: add configurable base url to embedded world

[eersnington]

Hey @Schniz, I was wondering if I can introduce changes to the world spec, specifically local world spec to allow users to configure base URL for queue streams.

Here's the reference issue #201 (comment) where a user had --experimental-https flag enabled but could get workflows to start cause the queue requests hard codes "http" as protocol. I think it would massively improve the DX if users can configure the base URL through either a config or Env vars because the current workaround is hacky at best.

The PR is draft and not complete at all ATM (haven't tested too). I want to introduce changes so the following are possible with local world:

• Call createEmbeddedWorld({}) with no env overrides to use .workflow-data and http://localhost:3000
• Pin the listener port only: createEmbeddedWorld({ port: 4010 }) -> queue hits http://localhost:4010
• Ephemeral ports for tests: createEmbeddedWorld({ port: 0 })
• Supply a full base URL so calls reach a proxy: createEmbeddedWorld({ baseUrl: 'https://example.com/workflow-proxy' }) (path kept, trailing slash trimmed)
• Or through an Env vars:

WORKFLOW_BASE_URL=https://world.acme.com/workflow
WORKFLOW_EMBEDDED_DATA_DIR=/var/run/workflow
PORT=5000

[changeset-bot]

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[vercel]

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[eersnington]

⚠️ No Changeset found

Latest commit: 09a465c

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets
When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

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will add this at the end if Gal approves of this idea or if this will interfere with any other plans of his

[vercel]

[eersnington]

@workflow/world-local:build
@workflow/core:test
cache miss, executing 083efc37933e9dd9
 @workflow/core@4.0.1-beta.9 test D:\a\workflow\workflow\packages\core
  WORKFLOW_TARGET_WORLD=embedded vitest run src
 'WORKFLOW_TARGET_WORLD' is not recognized as an internal or external command,
operable program or batch file.

 
 Looks like the Windows unit tests is failing due to windowisms. iirc, you set an env var in windows with "set"