Restructure lit codebase to separate out shared code

[jacobsimionato]

Currently, the "Lit" renderer is in a folder called web but it actually is a Lit-specific renderer.

Inside the Lit renderer, is some shared logic at src/0.8/types/ which is depended upon by the Angular renderer.

What we want to do is:

• Move the lit-specific code to a lit renderer folder
• Leave the code shared between web and angular in the web/ folder. We should try to have as much code as we can in this category, without adding extra complexity
• Make sure the angular codebase only depends on web/ and not lit/.

Please correct this if it's wrong, @ava-cassiopeia !

[ava-cassiopeia]

Yep, I think that's correct and a good end goal, I'll send some PRs to that end.

[jacobsimionato]

@ava-cassiopeia will continue working on this and delegate as necessary

[abalmush]

@jacobsimionato @ava-cassiopeia Hi guys! I noticed this task has been open for a while and we really need the core extraction to unblock React/Vue integrations. I went ahead and implemented it - apologies if you've already started working on this! Would you be so kind to review this PR #532 and let me know if it looks good? Happy to incorporate any feedback.