Add datapackage.json support to Tabular Data Viewer with a dropdown of listed data sources to load and view

[RandomFractals]

This is the last remaining feature we planned for adopting frictionless data standards in #15

See datapackage.json specs: https://specs.frictionlessdata.io/data-package/

And https://specs.frictionlessdata.io/data-resource/#introduction

[peterdesmet]

Cool! Being able to explore a dataset from a datapackage.json file (only) in Visual Studio Code would be a feature I'd likely use. If you need examples of large data packages, let me know.

[RandomFractals]

Great! I think your camtrap example dataset could be a good test bed for it: https://github.com/tdwg/camtrap-dp/tree/main/example

Remote data loading will be added in #53 & I jotted some notes from our table schema naming discussion in #84.

[RandomFractals]

Created simple Observable JS notebook to explore some of the public datapackage.json sources published on DataHub:

https://observablehq.com/@randomfractals/data-package

[RandomFractals]

Closing this since new public Data Packages picker added in #102 provides over 750 data packages to explore from github, and there is also new List Data Resources context menu in editor titlebar to view tabular data sources and table views from open datapackage.json files (see #104).