feat(web view): show detailed information of each block

[simonwinter]

Summary

Description:

Like the previous work, the vscode extension should have a side panel that allows people to see details about a particular block. This will mean we have a web view which will render the existing components we've previously developed for node-cards.

Details:

• @nokome to set up the rendering so we can inject our components
• Prioritise single node view (no need to worry about an entire document)
• Bring in existing node cards

[nokome]

Closing this as mostly done and/or superseded