Add typos-action

.github/workflows/typos.yml

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+# Spell checker
+
+name: Typos Action
+on: [pull_request]
+
+jobs:
+  run:
+    name: Spell Check with Typos
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Get changed files
+      id: changed-files
+      uses: tj-actions/[email protected]
+
+    - name: Check spelling
+      uses: crate-ci/typos@master
+      with:
+        files: ${{ steps.changed-files.outputs.all_changed_files }}
+        write_changes: false

_typos.toml

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+[files]
+extend-exclude = [
+  ".git/",     # Version control files
+  "achive/*",  # Archive files
+]
+
+# Match Inside a Word - Case Insensitive
+[default.extend-words]
+ue = "ue"          # Nestopia UE
+sav = "sav"        # .sav file extension
+kernal = "kernal"  # Commodore's low-level Operating System