Provide CommonJS and ESM implementations

[huntj88]

• Provide implementations for CommonJS and ESM
  • Tests rely on CommonJS implementation
• Changed way that live-share internals are provided in a way that works for CommonJS and ESM
  • new root, public, and internal index files created
  • root index exports public and internal index files
  • public index declaration file used for @microsoft/live-share
  • internal index declaration file used for @microsoft/live-share/internal
• Added json formatting for config files
  • Added CI check for formatting
  • executed npm run doctor
• Updated dependencies