Re-enable Playground CLI tests (#2445)

## Motivation for the change, related issues

The Playground CLI tests are currently disabled for two reasons:
1. The vitest config `includes` pattern is not matching any test files.
2. The run-cli tests are explicitly disabled because we struggled with
properly resolving Worker URLs during test execution.

## Implementation details

This PR:
1. Fixes the vitest config to find Playground CLI test modules.
2. Adjusts Worker URL resolution to work within vitest as well as for
built and unbuilt Playground CLI execution.
3. Assumes a default `/wordpress` docroot during automount when there is
no docroot defined.
4. Expands the Blueprints v1 schema to permit a Blueprints-v2-style
runPhp step to fix automount code that used a single step for both
Blueprint versions.

## Testing Instructions (or ideally a Blueprint)

- CI

Author: brandonpayton

.github/workflows/ci.yml

@@ -123,6 +123,17 @@ jobs:
                   MYSQL_DATABASE: test_db
                   MYSQL_USER: user
                   MYSQL_PASSWORD: password
+    test-playground-cli:
+        runs-on: ubuntu-latest
+        needs: [lint-and-typecheck]
+        steps:
+            - uses: actions/checkout@v4
+              with:
+                  submodules: true
+            - uses: ./.github/actions/prepare-playground
+              with:
+                  node-version: 22
+            - run: node node_modules/nx/bin/nx affected --target=test-for-node-22-and-above
     test-e2e:
         runs-on: ubuntu-latest
         needs: [lint-and-typecheck]