add SendInvoice struct

src/core/payments.rs

@@ -0,0 +1,28 @@
+use serde::Deserialize;
+
+#[derive(Debug, Deserialize)]
+pub struct SendInvoice {
+    chat_id: i64,
+    title: String,
+    description: String,
+    payload: String,
+    provider_token: String,
+    start_parameter: String,
+    currency: String,
+    prices: Vec<LabeledPrice>,
+    provider_data: Option<String>,
+    photo_url: Option<String>,
+    photo_size: Option<i64>,
+    photo_width: Option<i64>,
+    photo_height: Option<i64>,
+    need_name: Option<Bool>,
+    need_phone_number: Option<Bool>,
+    need_email: Option<Bool>,
+    need_shipping_address: Option<Bool>,
+    send_phone_number_to_provider: Option<Bool>,
+    send_email_to_provider: Option<Bool>,
+    is_flexible: Option<Bool>,
+    disable_notification: Option<Bool>,
+    reply_to_message_id: Option<i64>,
+    reply_markup: Option<InlineKeyboardMarkup>,
+}