Create web hook event filter

WebhooksFilterProvider.cs

    public class WebhooksFilterProvider : IWebHookFilterProvider
    {
        private readonly Collection<WebHookFilter> filters = new Collection<WebHookFilter>
        {
            new WebHookFilter
            {
                Name = "NewInquiry",
                Description = "new inquiry is raised."
            },
            new WebHookFilter
            {
                Name = "UpdateSalesInquiry",
                Description = "existing inquiry is updated."
            },
        };

        public Task<Collection<WebHookFilter>> GetFiltersAsync()
        {
            return Task.FromResult(this.filters);
        }
    }