add .gitignore in workspace, ignore .vscode

Author: bjornregnell

workspace/.gitignore

@@ -0,0 +1,28 @@
+# Editor files
+
+**/.vscode  # vs code
+*.swp       # vim
+*~          # emacs
+
+# Java / Scala
+
+**/*.class
+**/.bloop
+**/.metals
+**/metals.sbt
+**/.bsp
+**/.scalafmt.conf
+**/.ammonite
+**/.scala-build/
+
+# Eclipse
+**/*.cache-main
+**/.metadata
+**/.classpath
+**/.project
+
+# Sbt
+**/target
+
+# IntelliJ
+**/.idea