* try to convert release pipeline to yaml
* ensure trigger
* fix variable expansion
* specify name specifically
* add release and fix powershell setup
* fix name
* uncomment vsce task
* only do release pipeline on release branch
* only allow rel branch for release
* enable trigger always, we can rely on manual verification
* attempt to sign files
* sign files
* fix signing
* add signing install
* fix pool
* because of webpack, only one file to sign
* sign files before packaging and sign vsix