Add codespell to CI to find typos early

Author: DimitriPapadopoulos

.github/workflows/codespell.yml

@@ -0,0 +1,18 @@
+---
+name: Codespell
+
+on:
+  pull_request:
+  push:
+
+jobs:
+  codespell:
+    name: Check for spelling errors
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: codespell-project/actions-codespell@master
+        with:
+          skip: *.po,base64.*,SSLerrs.h
+          ignore_words_file: codespell_ignore_words.txt

codespell_ignore_words.txt

@@ -0,0 +1,5 @@
+ba
+gord
+parm
+parms
+pres