servo: Merge #10825 - Adding vscode and intellij settings folders to gitignore (from craftytrickster:gitignore-update); r=Ms2ger

I was going to try VSCode to see if the debugger works well or not with Rust. Since VSCode (as well as other editors) add their own project files to git, I figured they should be accounted for in the .gitignore file.

Source-Repo: https://github.com/servo/servo
Source-Revision: 0efbe5ece680ca515dcef95688a4b680a6a0df5e

servo/.gitignore

@@ -26,3 +26,12 @@ servo-test
 Servo.app
 .config.mk.last
 /glfw
+
+# Editors
+
+# IntelliJ
+.idea
+*.iws
+
+# VSCode
+.vscode