Added .gitignore

.gitignore

...braries/Maven__com_google_android_annotations_4_1_1_4.xml

.idea/libraries/Maven__com_google_api_api_common_2_1_3.xml

.idea/libraries/Maven__com_google_api_gax_2_11_0.xml

.idea/libraries/Maven__com_google_api_gax_grpc_2_11_0.xml

..._grpc_proto_google_cloud_bigqueryconnection_v1_2_1_10.xml

..._proto_google_cloud_bigqueryconnection_v1beta1_0_9_10.xml

..._com_google_api_grpc_proto_google_common_protos_2_7_2.xml

.../Maven__com_google_api_grpc_proto_google_iam_v1_1_2_1.xml

...com_google_auth_google_auth_library_credentials_1_4_0.xml

...com_google_auth_google_auth_library_oauth2_http_1_4_0.xml

...ven__com_google_auto_value_auto_value_annotations_1_9.xml

...m_google_cloud_google_cloud_bigqueryconnection_2_1_10.xml

...ibraries/Maven__com_google_code_findbugs_jsr305_3_0_2.xml

.idea/libraries/Maven__com_google_code_gson_gson_2_8_9.xml

..._com_google_errorprone_error_prone_annotations_2_11_0.xml

...libraries/Maven__com_google_guava_failureaccess_1_0_1.xml

.idea/libraries/Maven__com_google_guava_guava_31_0_1_jre.xml

...nablefuture_9999_0_empty_to_avoid_conflict_with_guava.xml

...ven__com_google_http_client_google_http_client_1_41_2.xml