Enforce arduino sketch folder naming and fix build path

- Update workflow to only compile .ino files where the filename matches the directory name.
- Use --build-path instead of deprecated cache flags.
- Ensure proper directory resolution for examples/SerialDemo/SerialDemo.ino structure.

Author: jit89

.github/workflows/compile-test.yml

@@ -30,17 +30,27 @@ jobs:
 
       - name: Compile Examples
         run: |
-         # Create the cache directory
-         mkdir -p /tmp/arduino-cache
+         # Create a dedicated build directory for caching
+          mkdir -p /tmp/arduino-build
           
-          # Find every .ino file, get its directory, and compile with caching
-          for example in $(find ./examples -name "*.ino"); do
+          # Find all .ino files that are in a folder named exactly like the file
+          # This avoids trying to compile parent directories
+          find ./examples -name "*.ino" | while read -r example; do
             EXAMPLE_DIR=$(dirname "$example")
-            echo "Compiling sketch in $EXAMPLE_DIR..."
-            
-            $HOME/bin/arduino-cli compile \
-              --fqbn rp2040:rp2040:rpipico \
-              --build-cache-path /tmp/arduino-cache \
-              "$EXAMPLE_DIR"
+            SKETCH_NAME=$(basename "$example" .ino)
+            PARENT_DIR_NAME=$(basename "$EXAMPLE_DIR")
+
+            if [ "$SKETCH_NAME" == "$PARENT_DIR_NAME" ]; then
+              echo "----------------------------------------------------"
+              echo "Compiling valid sketch: $EXAMPLE_DIR"
+              echo "----------------------------------------------------"
+              
+              $HOME/bin/arduino-cli compile \
+                --fqbn rp2040:rp2040:rpipico \
+                --build-path /tmp/arduino-build \
+                "$EXAMPLE_DIR"
+            else
+              echo "Skipping $example: filename does not match folder name."
+            fi
           done