FEAT: add expandStoryTree config flag

[Wesleyzxc]

Feature: add expandStoryTree config flag to expand all stories

Relates to https://github.com/tajo/ladle/issues/423, I saw a follow up comment but no movement, so decided to follow up on the changes in case this is still relevant.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: b22a3fdf0674eb015d2907fc1d0a17c86ec6012f

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

This PR includes changesets to release 14 packages

| Name | Type | | ----------------- | ----- | | website | Minor | | @ladle/react | Minor | | test-config | Minor | | example | Patch | | test-addons | Patch | | test-babel | Patch | | test-config-ts | Patch | | test-css | Patch | | test-decorators | Patch | | test-playwright | Patch | | test-programmatic | Patch | | test-provider | Patch | | test-baseweb | Patch | | test-msw | 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