feat: add catalog browsing routes for scenarios and bundles

[hyde-repo]

Scenarios :

• Add GET route "/v1/catalog/scenarios/list" to list available scenarios.
• Add GET route "/v1/catalog/scenarios/{scenario_id}" to retrieve a scenario definition.
  • Add GET "/{scenario_id}/changelog" for scenario changelog.
  • Add GET "/{scenario_id}/versions" for scenario version history.
• Define request/reply schemas so the routes are documented in Swagger.

Actions :

• Add GET route "/v1/catalog/actions/list" to list available actions.
• Add GET route "/v1/catalog/actions/{action_id}" to retrieve an action definition.
  • Add GET "/{action_id}/changelog" for action changelog.
  • Add GET "/{action_id}/versions" for action version history.
• Define request/reply schemas so the routes are documented in Swagger.