Enable the community to offer commercial Node-RED nodes

### Epic

#1891

### Description

As a Node-RED node developer or partner,

I want to offer premium features and/or official support for my nodes commercially (with an open-source basis),

so that I can monetize my work, contribute to the ecosystem, and maintain the open-source nature of the platform.

### Which customers would this be availble to

All Users, (CE)

### Acceptance Criteria

- [ ] Nodes should be evaluated and approved by the FlowFuse team based on predefined criteria, such as functionality, code quality, adherence to Node-RED best practices, and the presence of an open-source basis.
- [ ] Create a dedicated "FlowFuse marketplace" for commercial Node-RED nodes, to facilitate easy discovery, purchase, and installation.
- [ ] The marketplace should be easily accessible and integrated with the FlowFuse platform to ensure a seamless user experience.