Add Aztec Compiler plugin to Remix Project

[hsy822]

Adds the Aztec Compiler plugin to Remix, providing a styled UI for importing example projects, selecting targets under aztec/, and compiling via WebSocket with a spinner and modal dialogs for success or error. Environment-specific endpoints are configured via REACT_APP_… vars and Webpack.

[netlify[bot]]

👷 Deploy request for remixproject pending review.

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🔨 Latest commit	7138e65b13187b94b735043b5a65b547285256ed