refactor: move telegram channel files

Signed-off-by: Asklv <boironic@gmail.com>

main/channels/telegram/telegram_bot.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include "esp_err.h"
+
+/**
+ * Initialize the Telegram bot.
+ */
+esp_err_t telegram_bot_init(void);
+
+/**
+ * Start the Telegram polling task (long polling on Core 0).
+ */
+esp_err_t telegram_bot_start(void);
+
+/**
+ * Send a text message to a Telegram chat.
+ * Automatically splits messages longer than 4096 chars.
+ * @param chat_id  Telegram chat ID (numeric string)
+ * @param text     Message text (supports Markdown)
+ */
+esp_err_t telegram_send_message(const char *chat_id, const char *text);
+
+/**
+ * Save the Telegram bot token to NVS.
+ */
+esp_err_t telegram_set_token(const char *token);
+