MAINT: Make codespell a Pixi task

Author: VeckoTheGecko

.github/workflows/qaqc.yaml

@@ -21,15 +21,7 @@ jobs:
 
       - uses: ./.github/actions/setup-pixi
 
-      # NOTE: this isn't a comprehensive spellcheck, just common typos
-      - name: Spellcheck
-        if: always()
-        uses: codespell-project/actions-codespell@v2
-        with:
-          check_filenames: true
-          check_hidden: true
-          skip: '.git,*.js,qaqc.yml'
-          ignore_words_list: hist,nd
+      - run: pixi run codespell
 
       # borrowed from https://github.com/ProjectPythia/pythia-foundations/blob/main/.github/workflows/link-checker.yaml
       - name: Disable Notebook Execution Before Linkcheck