text: Title: Improve error message for unsupported architectures
  Body: ## Problem
  
  <!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
  
  If the user attempts to use the CLI on an unsupported architecture then an obscure error message is shown:
  
  ```
  $ prisma db push
  ...
  OSError: [Errno 8] Exec format error: '/tmp/prisma/binaries/engines/1c9fdaa9e2319b814822d6dbfd0a69e1fcc13a85/prisma-cli-linux'
  ```
  
  ## Suggested solution
  
  <!-- A clear and concise description of what you want to happen. -->
  
  If this error occurs we should point the user to documentation describing how to build the CLI and the engine binaries themselves.
  
  ## Additional context
  
  <!-- Add any other context or screenshots about the feature request here. -->
  
  Original error reported in #195
     
  ## Implementation
  
  Modify `src/prisma/cli/prisma.py` to capture exec format errors and report an error that the current platform / architecture is unsupported.