chore: set up pre-commit hooks and fix linting (Task #181)

tasks/cli.py

@@ -1,6 +1,7 @@
 import argparse
-import sys
-from db import init_db, add_task, list_tasks, update_task, delete_task
+
+from db import add_task, delete_task, init_db, list_tasks, update_task
+
 
 def main():
     init_db()

tasks/db.py

@@ -1,5 +1,5 @@
+
 import duckdb
-import os
 
 DB_PATH = "tasks/tasks.duckdb"