pack: reconfigure .gitignore files and settings for IntelliJ products, Visual Studio Code IDE

.idea/prettier.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="PrettierConfiguration">
+    <option name="myRunOnSave" value="true" />
+    <option name="myRunOnReformat" value="true" />
+    <option name="myFilesPattern" value="{**/*,*}.{js,ts,jsx,tsx,vue,html,json,mts,md}" />
+  </component>
+</project>