fix: set correct permissions for .cosmic dir

scripts/preinstall

@@ -10,13 +10,30 @@ PKL_URL="https://github.com/apple/pkl/releases/download/${PKL_VERSION}/pkl-${PKL
 PKL_DEST="$COSMIC_DIR/pkl"
 PATHS_FILE="/etc/paths.d/cosmic"
 
-# Create the cosmic directory if it does not exist
-if [ ! -d "$COSMIC_DIR" ]; then
-    mkdir -p "$COSMIC_DIR" || { echo "Failed to create directory $COSMIC_DIR"; exit 1; }
+# Check the current ownership and permissions of the .cosmic directory
+if [ -d "$COSMIC_DIR" ]; then
+    echo "$COSMIC_DIR already exists. Checking permissions..."
+    ls -ld "$COSMIC_DIR"
 else
-    echo "$COSMIC_DIR already exists."
+    # Create the .cosmic directory if it does not exist
+    echo "$COSMIC_DIR does not exist. Creating it now..."
+    mkdir -p "$COSMIC_DIR" || { echo "Failed to create directory $COSMIC_DIR"; exit 1; }
+fi
+
+# Ensure the current user has ownership of the directory
+if [ "$(stat -f '%u' "$COSMIC_DIR")" -ne "$(id -u)" ]; then
+    echo "Ownership mismatch. Setting ownership of $COSMIC_DIR to $USER..."
+    sudo chown -R "$USER:staff" "$COSMIC_DIR" || { echo "Failed to change ownership of $COSMIC_DIR"; exit 1; }
 fi
 
+# Set permissions for the .cosmic directory
+echo "Setting permissions of $COSMIC_DIR to 755..."
+chmod 755 "$COSMIC_DIR" || { echo "Failed to set permissions of $COSMIC_DIR"; exit 1; }
+
+# Verify permissions and ownership again
+echo "Verifying ownership and permissions:"
+ls -ld "$COSMIC_DIR"
+
 # Download the PKL file
 echo "Downloading PKL from $PKL_URL..."
 if curl -L -o "$PKL_DEST" "$PKL_URL"; then