fix typos, add codespell pre-commit hook (#264)

* fix typos, add codespell pre-commit hook

* Update .pre-commit-config.yaml

---------

Co-authored-by: Sebastian Raschka <mail@sebastianraschka.com>

.pre-commit-config.yaml

@@ -0,0 +1,17 @@
+# A tool used by developers to identify spelling errors in text.
+# Readers may ignore this file.
+
+default_stages: [commit]
+
+repos:
+  - repo: https://github.com/codespell-project/codespell
+    rev: v2.3.0
+    hooks:
+      - id: codespell
+        name: codespell
+        description: Check for spelling errors in text.
+        entry: codespell
+        language: python
+        args:
+          - "-L ocassion,occassion,ot,te,tje"
+        files: \.txt$|\.md$|\.py|\.ipynb$