Enhance Role-Based Access for Slack Integration

[Stefanosapk]

Is your feature request related to a problem? Please describe.
As a NuxHub member, I wanted to set up a Slack Webhook, but this option is currently restricted to Owners only. It appears that the Slack integration settings exist outside individual projects, within a global settings tab, which limits access for non-Owners.

Describe the solution you'd like
I would prefer to see Slack integration moved into each Project's Settings, allowing members to configure it as well.

Describe alternatives you've considered
N/A

Additional context
Restricting this feature to Owners only can hinder productivity. In many companies, Owners typically hold high-level roles such as VP, Director, or Head of Department, and they may not be involved in day-to-day setup tasks. Granting project-specific permissions for Slack integration would offer more flexibility and empower team members to manage integrations efficiently.