feat: reload config on push to .github repository, push new config all org repositories

[mrparkers]

here is a summary of the intended changes:

• whenever the config file located within the .github folder changes, a new webhook event is sent to the app to signal that the config needs to be refreshed. previously, we'd refresh the config every 15 minutes, so there's a short window where the config would be updated but it wouldn't be reflected on the app
• whenever the branch protection config changes, the app should push these changes to all non-whitelisted repositories in the github org. previously, these kinds of updates after a config change had to be manual

[liatrio-bot]

Terraform Plan: 0 to add, 1 to change, 0 to destroy.

Resources to update:

! azurerm_app_service.branch_protection_service

[liatrio-bot]

Terraform Plan: 0 to add, 1 to change, 0 to destroy.

Resources to update:

! azurerm_app_service.branch_protection_service

[liatrio-bot]

Terraform Plan: 0 to add, 1 to change, 0 to destroy.

Resources to update:

! azurerm_app_service.branch_protection_service

[liatrio-bot]

Terraform Plan: 0 to add, 1 to change, 0 to destroy.

Resources to update:

! azurerm_app_service.branch_protection_service

[liatrio-bot]

Terraform Plan: 0 to add, 1 to change, 0 to destroy.

Resources to update:

! azurerm_app_service.branch_protection_service

[liatrio-bot]

tf/tfplan.json

Terraform Plan: 0 to be created, 0 to be deleted, 1 to be updated, 0 to be replaced, 3 unchanged.

Resources to update

! azurerm_app_service.branch_protection_service

[RobertKelly]

Like the all repos feature as well.