chore/development sandbox

[thescientist13]

Related Issue

Adding a dedicated "sandbox" for demoing different live examples of WCC

Summary of Changes

1. basic workflow w/ live reload
2. Examples
   • Light DOM
   • DSD
   • JSX + Light DOM
   • JSX + DSD (broken, see JSX components not rendering into a declarative shadow root (e.g. <template> tag) #128 ) ⛔
   • JSX + Light DOM + inferredObservability
   • JSX + DSD + inferredObservability? (will be broken until JSX components not rendering into a declarative shadow root (e.g. <template> tag) #128 ) 🚫

TODO

1. More examples
   • JSX + Light DOM + inferredObservability
   • JSX + DSD + inferredObservability? (will be broken until JSX components not rendering into a declarative shadow root (e.g. <template> tag) #128 ) 🚫
2. Update Contributing
3. docs livereload (nice to have)

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