* Use new eslint rules and apply fixes. Use new logo component and shared theme + webpack config.
* Add shared component to display a copy icon and copy to clipboard with confirmation state
* Organise imports
* Add copy mixnode identity key to list of mixnodes and detail view
* Update nvm node version to 16
* Update GitHub Actions for Network Explorer to use yarn and yarn workspaces
* Switch favicon for smaller N icon
* Update README
* Add error boundary