Project page for different project types

[nighca]

Project detail / project page support for multiple project types.

Clarification:

• We may support different project types via dedicated project pages per type (not necessarily a single project page that switches UI by type).

Scope ideas:

• Define URL / routing strategy for project detail pages when multiple types exist.
• Ensure all “open in editor / remix / run / share” entry points resolve to the correct type-specific editor/runtime.
• Update project page components that assume SPX-specific structure (runner, file previews, metadata display) to be type-aware or type-specific.