feat: add clearable functionality to webhook input field in UpsertWebhookDialog

- Introduced a clearable prop to the input field, allowing users to easily reset the field value.
- Implemented an onClear handler to reset the input when the clear action is triggered.

These changes aim to enhance user experience by providing a more intuitive way to manage input values in the webhook dialog.

Author: sarimrmalik

src/features/dashboard/settings/webhooks/upsert-webhook-dialog-steps.tsx

@@ -367,6 +367,8 @@ export function UpsertWebhookDialogSteps({
                         disabled={isLoading}
                         minLength={32}
                         className="min-w-0"
+                        clearable
+                        onClear={() => field.onChange('')}
                         {...field}
                         ref={(el) => {
                           field.ref(el)