feature/issue 108 fine grained observability

[thescientist13]

Related Issue

resolves #108 (very much an early WIP)

demo PR available at thescientist13/greenwood-counter-jsx#3

Summary of Changes

1. Fine grained observability for basic textContent replacements

TODO

1. Fine grained observability for Shadow DOM
2. Attributes
3. Can it handle things like loops, like a list? (e.g. Todo App)
   • actually, when everything is just "signals" does the initial render matter?
4. Testing
5. Documentation
   • JSX expressions must be wrapped in a tag
6. clean up console logs
7. (nice to have) Co-mingled interpolations - make it so JSX expressions don't have to be wrapped in DOM elements, e.g.

   // does not work
   <h1>Hello, {greeting}!</h1>
   
   <span class={conditionalClass}>{count}{conditionalText}</span>
   
   // works
   <h1>Hello, <span>{greeting}</span>!</h1>
   
   <span class={conditionalClass}><span>{count}</span>{conditionalText}</span>