New compiler

[treo]

Description

The old compiler relied heavily on string concatenation to produce the output code.

This new compiler uses the python ast module to enforce syntactically correct code generation.

Caveat: at the moment it does not care about the debug mode. We will rebuild the debug mode in a follow up PR.

Extra:
A Xircuits command has been added in this PR. Users can now compile .xircuits canvas from outside Jupyterlab using xircuits-compile example_canvas.xircuits output.py.

Pull Request Type

• Xircuits Core (Jupyterlab Related changes)
• Xircuits Canvas (Custom RD Related changes)
• Xircuits Component Library
• Xircuits Project Template
• Testing Automation
• Documentation
• Others (Please Specify)

Type of Change

• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Tests

1. Used the compiler with the provided examples. Simply opening, compiling and running them.
2. Compile a xircuits canvas using the syntax xircuits-compile example_canvas.xircuits output.py.

Tested on?

• Windows
• Linux Ubuntu
• Centos
• Mac
• Others (State here -> xxx )

TODO

• Add support for components in non-standard paths
• Add support for python 3.8