ci: add workflow to check the spelling.

.github/_typos.toml

@@ -0,0 +1,14 @@
+# Typos configuration file
+#
+# Info:    https://github.com/marketplace/actions/typos-action
+# Install: brew install typos-cli
+# Install: conda install typos
+# Run:     typos -c .github/_typos.toml
+
+[files]
+extend-exclude = [
+    "_typos.toml",
+    "docs/xmldocs/",
+    "LLama.Web/wwwroot/",
+    "LLama/runtimes/deps/"
+]

.github/workflows/spell_check.yml

@@ -0,0 +1,31 @@
+# Check pull requests for typos.
+#
+# Configuration: .github/_typos.toml
+#
+# Info:          https://github.com/marketplace/actions/typos-action
+# Local install: brew install typos-cli
+# Local install: conda install typos
+# Local run:     typos -c .github/_typos.toml
+
+name: Spell Check
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  run:
+    name: Spell check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v3
+
+      - name: Use custom config file
+        uses: crate-ci/typos@master
+        with:
+          config: .github/_typos.toml
+          write_changes: false
+          quiet: true