[CI] Buildkite setup (#83)

Signed-off-by: Roger Wang <hey@rogerw.io>

.buildkite/pipeline.yml

@@ -0,0 +1,7 @@
+steps:
+  - label: "Dummy pipeline"
+    if: "false"
+    agents:
+      queue: cpu_queue_premerge_us_east_1
+    commands:
+      - "echo 'This pipeline is intentionally a no-op.'"

.gitignore

@@ -160,7 +160,7 @@ cython_debug/
 docker/
 
 # scripts
-scripts/
+/scripts/
 
 # tests
 tests/