chore: check colour definitions in CI

.github/workflows/test.yaml

@@ -1,4 +1,4 @@
-name: Test .el files
+name: Test .el files / Check color definitions
 
 on:
   push:
@@ -17,6 +17,11 @@ jobs:
           wget http://mirrors.kernel.org/ubuntu/pool/main/e/emacs25/emacs25-nox_25.2+1-6_amd64.deb http://mirrors.kernel.org/ubuntu/pool/main/e/emacs25/emacs25-bin-common_25.2+1-6_amd64.deb http://mirrors.kernel.org/ubuntu/pool/main/e/emacs25/emacs25-common_25.2+1-6_all.deb http://mirrors.kernel.org/ubuntu/pool/main/e/emacsen-common/emacsen-common_2.0.8_all.deb http://mirrors.kernel.org/ubuntu/pool/universe/c/compat-el/elpa-compat_29.1.4.4+dfsg-1_all.deb
           sudo apt-get install --allow-downgrades ./emacs25-nox_25.2+1-6_amd64.deb ./emacs25-bin-common_25.2+1-6_amd64.deb ./emacs25-common_25.2+1-6_all.deb ./emacsen-common_2.0.8_all.deb ./elpa-compat_29.1.4.4+dfsg-1_all.deb
 
+      - name: Install Whiskers
+        run: |
+          sudo curl -o /usr/local/bin/whiskers https://github.com/catppuccin/whiskers/releases/latest/download/whiskers-x86_64-unknown-linux-gnu
+          sudo chmod +x /usr/local/bin/whiskers
+
       - name: Install Just
         uses: extractions/setup-just@v1
         with:
@@ -30,5 +35,11 @@ jobs:
       - name: Check indentation
         run: emacs --script scripts/indent-lisp-files.el
 
+      - name: Generate catppuccin-definitions.el
+        run: whiskers emacs.tera
+
+      - name: Format catppuccin-definitions.el
+        run: emacs --script scripts/format-definitions.el -f format-definitions
+
       - name: Compare changes
         run: git diff --exit-code