Add bazelci presubmit configuration for Tulsi.

PiperOrigin-RevId: 228796474
diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
new file mode 100644
index 0000000..c6c47bb
--- /dev/null
+++ b/.bazelci/presubmit.yml
@@ -0,0 +1,7 @@
+---
+platforms:
+  macos:
+    build_targets:
+    - "//:tulsi"
+    test_targets:
+    - "//:tests"