feat: add new notification methods (telegram, webhooks, gotify) (#295)

includes/i18n/en.php

@@ -120,6 +120,18 @@ $i18n = [
     "smtp_password"   => "SMTP Password",
     "from_email"      => "From email (Optional)",
     "smtp_info"       => "SMTP Password is transmitted and stored in plaintext. For security, please create an account just for this.",
+    "telegram"        => "Telegram",
+    "telegram_bot_token" => "Telegram Bot Token",
+    "telegram_chat_id" => "Telegram Chat ID",
+    "webhook"         => "Webhook",
+    "webhook_url"     => "Webhook URL",
+    "request_method"  => "Request Method",
+    "custom_headers"  => "Custom Headers",
+    "webhook_payload" => "Webhook Payload",
+    "webhook_iterator_key" => "Replace {{subscriptions}} with key name",
+    "variables_available" => "Variables available",
+    "gotify"          => "Gotify",
+    "token"           => "Token",
     "categories"      => "Categories",
     "save_category"   => "Save Category",
     "delete_category" => "Delete Category",
@@ -215,6 +227,7 @@ $i18n = [
     "email_error"      => "Error sending email",
     "notification_sent_successfuly" => "Notification sent successfully",
     "notifications_settings_saved" => "Notification settings saved successfully.",
+    "notification_failed" => "Notification failed",
     // Payments
     "payment_in_use"   => "Can't disable used payment method",
     "failed_update_payment" => "Failed to update payment method in the database",