Implement a basic bot template

Add the gitignore entries for session files as well as create an example env file for reference.

.env.example

@@ -0,0 +1,3 @@
+API_ID=12345
+API_HASH=0123456789abcdef0123456789abcdef
+BOT_TOKEN=123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11

.gitignore

@@ -316,3 +316,7 @@ pyrightconfig.json
 # Ignore all local history of files
 .history
 .ionide
+
+### Telethon ###
+*.session
+*.session-journal

src/Bot.py

@@ -0,0 +1,18 @@
+from dotenv import load_dotenv
+from telethon import TelegramClient, events
+from os import getenv
+
+def main() -> None:
+	load_dotenv()
+
+	api_id = getenv("API_ID")
+	api_hash = getenv("API_HASH")
+	bot_token = getenv("BOT_TOKEN")
+
+	app = TelegramClient('app', api_id, api_hash).start(bot_token=bot_token)
+
+	@app.on(events.NewMessage(incoming=True, pattern='/start'))
+	async def start(event):
+		await event.reply("Hello!")
+
+	app.run_until_disconnected()

src/__main__.py

@@ -0,0 +1,4 @@
+from Bot import main
+
+if __name__ == "__main__":
+    main()