cleanup jobs for Holochain Beta RC.2 update

[pospi]

https://github.com/neighbour-hoods/applet-template/pull/7 has already been reconfigured as the basis for this repo's main branch. Any other additions to that PR will need to be merged into here to realign it with the Applet Template.

There are some other odds and ends to take care of as well:

• [x] merge https://github.com/neighbour-hoods/applet-template/pull/4 & add another script to download the necessary hREA DNA dependencies
• [x] enable sourcemaps for rollup during development so we can debug inside Tauri
• [x] update hREA modules after releasing 0.0.1-alpha.16
  • [x] remove react from UI package dependencies (see https://github.com/h-REA/hREA/commit/725b5bf4983a29b8c842735c54c58ff155ee208a)
  • [x] work through https://github.com/h-REA/hREA/issues/379 and remove @graphql-tools/merge from UI package dependencies

[pospi]

cleanup completed in 4a63522