Organization Hierarchy Introduction

### Description

Introduction of an additional 'Organizational Hierarchy' level. This new feature will act as an intermediate layer between the 'Team' and 'Admin' levels, enabling the organization's Admin to have a more comprehensive and efficient oversight over multiple teams.

Alongside the introduction of the Organizational Hierarchy level, I also propose assigning the following features to the new level:

1. SSO configuration
2. Stack Overview for all assigned Teams
3. Template configuration

Note: Only available in Enterprise Tier, see: https://github.com/flowforge/flowforge/issues/2329

### 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/2339
```