Implement feature to Copy Snippet with context 

Users should be able to copy their snippets with contextual information added by Pieces OS. 


```
assetApi.assetSpecificAssetExport({exportType:[ pieces.AssetSpecificAssetExportExportTypeEnum.Md](http://pieces.assetspecificassetexportexporttypeenum.md/), asset: firstAssetId})
```

& you will get a markdown version of your asset