Re-implement the SymPy plugin

[da-liii]

Why?

Using Pants and PEX, we will get rid of the error message:

Please install sympy first, for example:
    pip install sympy

Because sympy is bundled in the PEX file, in this case, it is sympy==1.10.1.

How to install it

./pants run cli:install -- sympy

# For Mogan Editor
TEXMACS_HOME_PATH=~/.Xmacs ./pants run cli:install -- sympy

Here is the logging of an installation (Using Mogan Editor):

Removing existing /home/sadhen/.Xmacs/plugins/sympy
Packaging: ./pants package //:sympy
23:26:11.94 [INFO] Wrote dist/sympy.pex
Installing: /home/sadhen/.Xmacs/plugins/sympy
Installing: /home/sadhen/.Xmacs/plugins/sympy/bin/sympy.pex

How to test it

Here is the output of launch the SymPy plugin:

TeXmacs] debug-shell, Launching 'python3 /home/sadhen/.Xmacs/plugins/sympy/bin/sympy.pex'