add inspector support

Author: dfalbel

extensions/positron-python/python_files/posit/positron/inspectors.py

@@ -1239,6 +1239,14 @@ def _is_active(self, value) -> bool:
         return True
 
 
+class BigQueryConnectionInspector(BaseConnectionInspector):
+    CLASS_QNAME = ("google.cloud.bigquery.client.Client",)
+
+    def _is_active(self, value) -> bool:
+        # a connection is always active if the client exists
+        return True
+
+
 class IbisExprInspector(PositronInspector["ibis.Expr"]):
     def has_children(self) -> bool:
         return False
@@ -1280,6 +1288,7 @@ def to_plaintext(self) -> str:
     **dict.fromkeys(IbisDataFrameInspector.CLASS_QNAME, IbisDataFrameInspector),
     **dict.fromkeys(SnowflakeConnectionInspector.CLASS_QNAME, SnowflakeConnectionInspector),
     **dict.fromkeys(DatabricksConnectionInspector.CLASS_QNAME, DatabricksConnectionInspector),
+    **dict.fromkeys(BigQueryConnectionInspector.CLASS_QNAME, BigQueryConnectionInspector),
     "ibis.Expr": IbisExprInspector,
     "boolean": BooleanInspector,
     "bytes": BytesInspector,