chore: add Gitpod

.gitignore

@@ -26,10 +26,21 @@ coverage
 # debug
 npm-debug.log*
 
-# editors
-.vscode
-.theia
-.idea
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
 
 # misc
 .DS_Store