Automating Webhook Creation

[ItzNotABug]

In the current setup, there isn't a direct method to verify if a webhook associated with a given API Key already exists.
However, the API returns an error when trying to add a webhook with a duplicate Event and Target URL.

We can use this behavior when setting up Ghosler for the first time. Based on the response, we can automatically decide whether to create a new webhook or skip this step if it's already in place.

This approach will simplify the Ghosler setup a bit more than the existing one.

[ItzNotABug]

Can be merged after improved_template branch is completed and closed.