Update .gitignore to ignore node_modules

This is to allow installing prettier locally because the Prettier VSCode extension includes a very outdated 2.x version of Prettier and version 3.x has a lot of bug fixes. The VSCode extension by default will use a locally installed version of prettier, but won't look globally because that can cause performance issues when someone has network mounted drives.

Author: tleonhardt

Diff for: .gitignore

@@ -50,3 +50,8 @@ Pipfile.lock
 
 # uv
 uv.lock
+
+# Node/npm used for installing Prettier locally to override the outdated version that is bundled with the VSCode extension
+node_modules/
+package-lock.json
+package.json