snippets to write first snippets
- new buffer
- export env to json, with version numbers
- table join types
- documentation helper
todo: powerquery
snippets new buffer table join types documentation helper
update the grammar microsoft/vscode-powerquery#66 (comment)
https://github.com/microsoft/vscode-powerquery/tree/master/syntaxes
original repo: https://github.com/microsoft/powerquery-language