fix(ci): link monorepo root in laravel e2e so siblings resolve from working tree

[soyuka]

Problem

The Laravel E2E installation job fails on the 5.0 line with:

PHP Fatal error: Uncaught Error: Interface "ApiPlatform\Metadata\SortFilterInterface"
not found in src/Laravel/Eloquent/Filter/OrderFilter.php:26

The install resolves api-platform/metadata (and other siblings) to the stale stable v4.3.15, which predates SortFilterInterface.

Root cause

The install step ran composer global link ../src/Laravel, pointing pmu at the laravel subdir. pmu discovers monorepo packages from the directory it's given, so it found only api-platform/laravel and registered a path repo for it alone.

The sibling packages had no path repo, so they resolved from packagist. pmu's link rewrites inter-package constraints to @dev, and @dev + prefer-stable makes composer pick the highest stable version — v4.3.15 — which lacks SortFilterInterface.

api-platform/laravel itself came from the working tree (the failing log shows 5.0.x-dev 369bb2c, composer's path-repo reference), which is why the runtime crash hit the working-tree OrderFilter against 4.3.15 metadata.

Fix

Link the monorepo root instead. pmu then registers path repos for every split package, and path repositories win over packagist even under prefer-stable, so all api-platform/* resolve from the working tree while the Laravel ecosystem stays on stable releases.

- composer global link ../src/Laravel --permanent
+ composer global link ../ --working-directory=$(pwd) --permanent

Verification

Reproduced both the failure and the fix locally (composer dry-run) against an untagged checkout (PR-like), confirming source resolution:

package	before (link subdir)	after (link root)
api-platform/laravel	5.0.x-dev (working tree)	dev-main (working tree)
api-platform/metadata	v4.3.15 (packagist)	dev-main (working tree)
api-platform/state	v4.3.15 (packagist)	dev-main (working tree)
laravel/framework	stable	stable

Targets 4.3 to propagate up to 4.4 and main. pmu needs no change — the job linked the wrong directory.