Add Panther framework usage example

docs/.vuepress/sidebar.ts

@@ -65,6 +65,7 @@ export default sidebar({
             "litestar",
             "blacksheep",
             "robyn",
+            "panther",
           ]
         },
       ],

docs/usage/frameworks/panther.md

@@ -0,0 +1,48 @@
+---
+title: Panther
+---
+
+There is the default example for `Panther` framework.
+
+We strongly recommend to use the following example as a standard way to use `PSQLPy` with `Panther` framework.
+
+## Complete example
+
+```python
+import uvicorn
+from psqlpy import ConnectionPool
+
+from panther import Panther
+from panther.app import API
+from panther.configs import config
+from panther.events import Event
+from panther.response import Response
+
+
+@Event.startup
+async def create_connection_pool():
+    config.connection_pool = ConnectionPool(
+        dsn="postgres://postgres:postgres@localhost:5432/postgres",
+        max_db_pool_size=10,
+    )
+
+
+@Event.shutdown
+async def close_connection_pool():
+    config.connection_pool.close()
+
+
+@API()
+async def pg_pool_example():
+    connection = await config.connection_pool.connection()
+    query_result = await connection.execute(
+        "SELECT * FROM users",
+    )
+    return Response(data=query_result.result())
+
+
+app = Panther(__name__, configs=__name__, urls={'/': pg_pool_example})
+
+if __name__ == "__main__":
+    uvicorn.run(app)
+```