feat: Initial project structure

- Creates the initial project structure for the Talía bot, including the `app` and `app/modules` directories.
- Adds placeholder files for the core application logic, modules, and configuration.
- Includes a `Dockerfile` and `docker-compose.yml` for containerization.
- Adds a `requirements.txt` file with the necessary dependencies.
- Creates a `tasks.md` file to track development progress.

app/modules/agenda.py

@@ -0,0 +1,9 @@
+# app/modules/agenda.py
+
+def get_agenda(chat_id):
+    """
+    Fetches and displays the user's agenda.
+    """
+    print(f"[{chat_id}] Fetching agenda...")
+    # TODO: Implement agenda logic
+    return "Here is your agenda for today."