ci: disallow some common capitalization mistakes (#2472)

* ci: only annotate linux for now

* style: block some common mistakes

.pre-commit-config.yaml

@@ -34,6 +34,14 @@ repos:
     types: [file]
     files: (\.cmake|CMakeLists.txt)(.in)?$
 
+- repo: local
+  hooks:
+  - id: disallow-caps
+    name: Disallow improper capitalization
+    language: pygrep
+    entry: PyBind|Numpy|Cmake
+    exclude: .pre-commit-config.yaml
+
 - repo: local
   hooks:
   - id: check-style