Refactor devcontainer 📦

[sduquemesa]

Context: Doing some housekeeping here on the devcontainer side.

Description of the Change:

• The previous build script was a bit cumbersome, here it has been simplified.
• Julia installation now automatically detects architectures, meaning there is no need for passing the optional JULIA_INSTALL arg to docker build.
• Only a single Dockerfile to create the container. This Dockerfile can also be used to create a completely isolated environment using docker (useful for testing, running simulations, etc.).
• Ensures changes on the code are reflected on the interpreter as they happen. To do so the workspace folder points to /mrmustard where the source code resides.
• Installs the jupyter extension automatically.

Benefits: Click and go 🚀

Possible Drawbacks: None

[sduquemesa]

@ziofil, I've readded oh-my-zsh to the container as default terminal

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.62%. Comparing base (a638bfb) to head (6460987).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #329   +/-   ##
========================================
  Coverage    87.62%   87.62%           
========================================
  Files           81       81           
  Lines         6158     6158           
========================================
  Hits          5396     5396           
  Misses         762      762           

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