Add warning to highlight large imgs

Author: Matteo-it

.github/workflows/preview.yml

@@ -89,6 +89,20 @@ jobs:
           find ./content/hardware -type f -name "*-pinout.png" -exec cp {} ./static/resources/pinouts/ \;
           find ./content/hardware -type f -name "*-step.zip" -exec cp {} ./static/resources/models/ \;
 
+      - name: Check for large files
+        run: |
+          find content -type f \( -name "*.png" -o -name "*.jpg" -o -name "*.jpeg" -o -name "*.svg" -o -name "*.gif" \) -size +2M -print0 |
+          while IFS= read -r -d $'\0' file; do
+            size=$(ls -lh "$file" | awk '{print $5}')
+            echo "::warning file=$file::Image is very large: $size. Consider optimizing it."
+          done
+
+          find content -type f \( -name "*.pdf" -o -name "*.zip" -o -name "*.mp4" \) -size +10M -print0 |
+          while IFS= read -r -d $'\0' file; do
+            size=$(ls -lh "$file" | awk '{print $5}')
+            echo "::warning file=$file::Asset file is very large: $size. This can impact repository size and checkout times."
+          done
+
       - name: Gatsby main cache
         uses: actions/cache@v4
         id: gatsby-cache-folder