This commit adds a new `channel-management` helper to Valkyrie which will always ensure permissions on new channels within the `defense` category are assigned to the same permission set as the channel category permissions.

It then sends a message to the newly created channel, listing the permissions and access levels they have.

- Removes list of permissions sent to channel
- Changes defense to load from specific channel id. You must setup env `DEFENSE_CATEGORY_ID` to have it function correctly.
- Merges into one function

This has already been applied.