Unify components and recipes

[ferranbt]

This PR consolidates the interfaces for recipes and components by having both operate directly on manifests rather than returning services/manifests. This simplifies the architecture and makes the system more composable.

Previously, recipes and components had different interfaces for modifying manifests:

• Recipes: Accepted an ExContext and Artifacts, returned a complete Manifest
• Components: Accepted a Service reference and ExContext, modified the service in-place

This distinction created unnecessary complexity since both are fundamentally doing the same thing: configuring and adding services to a manifest. The only real difference is that recipes are public CLI entry points while components are internal execution units - but this semantic difference doesn't justify different technical interfaces.

[canercidam]

🚀