Add mysql connection module

- include sqlalchemy engine for pandas

pyproject.toml

@@ -15,6 +15,7 @@ mysqlclient = "2.2.4"
 pyyaml = "6.0.1"
 commonlib = {path = "commonlib"}
 pydantic = "^2.8.2"
+sqlalchemy = "^2.0.32"
 
 
 [tool.poetry.group.dev.dependencies]

src/twfy_tools/db/connection.py

@@ -0,0 +1,35 @@
+"""
+Basic database connection for TheyWorkForYou database.
+"""
+
+from typing import cast
+
+import MySQLdb
+from sqlalchemy import URL, create_engine
+
+from ..common.config import config
+
+
+def get_twfy_db_connection() -> MySQLdb.Connection:
+    db_connection = cast(
+        MySQLdb.Connection,
+        MySQLdb.connect(
+            host=config.TWFY_DB_HOST,
+            db=config.TWFY_DB_NAME,
+            user=config.TWFY_DB_USER,
+            passwd=config.TWFY_DB_PASS,
+            charset="utf8",
+        ),
+    )
+    return db_connection
+
+
+engine = create_engine(
+    URL.create(
+        drivername="mysql+mysqldb",
+        username=config.TWFY_DB_USER,
+        password=config.TWFY_DB_PASS,
+        host=config.TWFY_DB_HOST,
+        database=config.TWFY_DB_NAME,
+    )
+)