add spelling.yml to spot spelling mistakes

See https://github.com/crate-ci/typos/blob/master/docs/github-action.md
for details

.github/workflows/spelling.yml

@@ -0,0 +1,16 @@
+name: Spell checker
+
+on: [push, pull_request]
+
+jobs:
+  typos:
+      name: "Spell check"
+      runs-on: ubuntu-latest
+      steps:
+        - name: Checkout
+          uses: actions/checkout@v4
+
+        - name: Find typos
+          uses: crate-ci/typos@master
+          with:
+            files: .

pyproject.toml

@@ -138,3 +138,7 @@ exclude_also = [
     "class .*\\bProtocol\\):",
     "@(abc\\.)?abstractmethod",
 ]
+
+[tool.typos.default]
+extend-words = { adaptee = "adaptee" }
+extend-ignore-identifiers-re = ["NDArray*"]