Admin to be able to delete and recreate all repository webhooks

[eddiejaoude]

The code for deleting and creating webhook already exists.

Steps are probably:

• Add to existing Admin only page with similar navigation as project dashboard (screenshot below)
• Cloud functions
  • Get all repositories
  • For each repository
    1. UI button is clicked (single repo button or all repo button)
    2. UI calls cloud function with an array of UIDs (could be 1 UID in the array if single repo)
    3. New cloud function loops over UIDs and … a. calls existing delete repo webhook function b. on the previous step a completing successfully, call create repo webhook function
    4. Cloud function returns the total successful / failed webhook creations and display in UI