Install architect package as dependency

[ibourgeois]

Context

As a Nebula developer, I need to have the architect package installed and available as a development dependency so I can use it to generate code for packages within the workbench.

Acceptance Criteria

• Add devoption/architect to composer.json require-dev
• Configure local path repository for packages/devoption/architect in composer.json
• Run composer install to pull in the architect package
• Verify architect CLI is available via ./vendor/bin/architect
• Test that architect commands work from the Nebula root directory

Notes

Use local path repository to enable development workflow where architect is modified locally in packages/devoption/architect.