feat: Enhance notification service configuration and refactor related components

- Updated notification service models to use pointers for boolean fields, allowing for better handling of enabled states.
- Introduced helper methods for getting and setting enabled states in notification and auth provider models.
- Refactored notification form templates to consolidate event trigger handling, improving code maintainability.
- Added SSL verification configuration to the application settings, allowing users to skip SSL verification for outgoing notifications.
- Enhanced the notification sending logic to respect the SSL verification setting.
- Introduced new migration to alter boolean defaults in the database schema for better compatibility with the updated models.
- Added unit tests for email and Rclone service functionalities to ensure reliability.

components/auth_providers_buttons.templ

@@ -35,9 +35,9 @@ templ AuthProviderButtons(providers []db.AuthProvider) {
 	} else {
 		<div class="space-y-2 w-full">
 			for _, provider := range providers {
-				if provider.Enabled {
-					<a 
-						href={ templ.SafeURL(fmt.Sprintf("/auth/provider/%d", provider.ID)) } 
+				if provider.GetEnabled() {
+					<a
+						href={ templ.SafeURL(fmt.Sprintf("/auth/provider/%d", provider.ID)) }
 						class="w-full inline-flex items-center justify-center px-4 py-2.5 bg-gray-100 border border-gray-300 rounded-lg font-medium text-gray-700 hover:bg-gray-200 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500 dark:bg-gray-700 dark:border-gray-600 dark:text-gray-200 dark:hover:bg-gray-600"
 					>
 						<span class="flex-shrink-0 w-5 h-5 mr-2.5">