Node Configuration Sharing

## Current Situation
In the current setup of FlowFuse's Team Library, when sharing node configurations, such as those for MQTT, critical information like usernames and passwords for node configurations is not included. This omission necessitates manual sharing of specific configuration details within a team for every new Node-RED development instance. This process is not only time-consuming but also inefficient, leading to potential security risks associated with manual credential sharing.

## User Story
As a Node-RED developer using FlowFuse,
I want to configure my MQTT connection once and have this configuration available in all my Node-RED instances across the team,
So that I do not need to manually share credentials or reconfigure my MQTT setup for every new development instance.

### Which customers would this be available to

Team + Enterprise Tiers (EE)

### Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate
```[tasklist]
### Tasks
- [ ] https://github.com/FlowFuse/flowfuse/issues/4306
- [ ] https://github.com/FlowFuse/flowfuse/issues/4307
```