feat: add try-except logic to _dbt module

Author: danlsn

src/dander/_dbt/__init__.py

@@ -0,0 +1,11 @@
+try:
+    from dbt.cli.main import dbtRunner, dbtRunnerResult
+except ImportError:
+    msg = f"""
+        dbt is not installed. Please install the dander dbt extra using:
+        
+        ```bash
+        pip install dander[dbt]
+        ```
+        """
+    raise ImportError(msg)