fix: use bun x playwright to ensure local playwright version is used

Author: slashtechno

frontend/run-e2e-tests.sh

@@ -46,7 +46,7 @@ for test_file in "${TEST_FILES[@]}"; do
     echo -e "${YELLOW}Running: $test_file${NC}"
     echo "----------------------------------------"
 
-    if npx --package=@playwright/test playwright test "$test_file" --reporter=list; then
+    if bun x playwright test "$test_file" --reporter=list; then
         echo -e "${GREEN}✓ $test_file passed${NC}"
     else
         echo -e "${RED}✗ $test_file failed${NC}"