create VScode theme scaffold
yo code
# ? What type of extension do you want to create? New Extension (TypeScript)
# ? What's the name of your extension? HelloWorld
### Press <Enter> to choose default for all options below ###
# ? What's the identifier of your extension? helloworld
# ? What's the description of your extension? LEAVE BLANK
# ? Initialize a git repository? Yes
# ? Bundle the source code with webpack? No
# ? Which package manager to use? npm
code ./helloworld