added prettier code cleanup

.github/workflows/prettier.yaml

@@ -0,0 +1,21 @@
+name: Prettier
+
+# This action works with pull requests and pushes
+on: [push]
+
+jobs:
+    prettier:
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v3
+              with:
+                  # Make sure the actual branch is checked out when running on pull requests
+                  ref: ${{ github.head_ref }}
+
+            - name: Prettify code
+              uses: creyD/prettier_action@v4.2
+              with:
+                 # This part is also where you can pass other options, for example:
+                 prettier_options: --write **/*.{js,md,css,html}

.prettierignore

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+# Ignore artifacts:
+build
+coverage
+assets
+gui/waterfall