brick.yaml added and .gitignore added to allow .bb directory

.bb/brick.yaml

@@ -0,0 +1,13 @@
+id: "https://opendata.ncats.nih.gov/"
+title: Tox21
+page: "https://opendata.ncats.nih.gov/public/tox21/assay/data/"
+description: >-
+  The goal of Tox21 is to research, develop, evaluate, and translate innovative test methods that will better predict how substances may affect humans and the environment. This includes the use of robotics in high-throughput screening (HTS) in Tox21 as well as the use of other new approach methodologies to evaluate substance toxicity.
+  The use of robotics in HTS is important because of the ability to increase the volume and speed of testing. While many conventional pre-clinical tests use animals, these approaches are often slow and expensive. In addition, they provide no guarantee of predicting toxic health effects on humans later observed in clinical trial settings. Automated, "high-throughput" screening serves an important role as an alternative method for animal use, as well as an efficient and forward-thinking use of scientific resources.
+resources:
+  brick/tox21_aggregated.parquet:
+    title: Tox21 Aggregated
+  brick/tox21.parquet:
+    title: Tox21
+  brick/tox21lib.parquet:
+    title: Tox21 Lib

.gitignore

@@ -1,4 +1,5 @@
 .*
+!.bb
 !.editorconfig
 !.envrc
 !.github