Code/Pseudos setup: Separate frontend from backend

[danielhollas]

This is a preparatory PR for refactoring the code setup. It is imho better to separate the frontend (widgets that are displayed in the app) from the routines that actually install stuff in the backend and in the CLI. In this PR, I only move code, and don't do any actual changes yet.

As an immediate advantage, just executing python -m aiidalab_qe --help got noticeably faster since we no longer import the rest of the app.

In the next PR, instead of importing the install routines in the widgets, we can simply invoke the CLI from a subprocess. That way we do not need to worry about the threading issues, which in turn will allow us to get rid of generating the code setup code and execute it directly.

[codecov]

Codecov Report

Attention: Patch coverage is 58.60215% with 77 lines in your changes missing coverage. Please review.

Project coverage is 68.19%. Comparing base (ea6b645) to head (ffc85f4).
Report is 2 commits behind head on main.

Files	Patch %	Lines
src/aiidalab_qe/setup/codes.py	22.89%	64 Missing ⚠️
src/aiidalab_qe/setup/pseudos.py	90.80%	8 Missing ⚠️
src/aiidalab_qe/__main__.py	37.50%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #796      +/-   ##
==========================================
- Coverage   68.22%   68.19%   -0.03%     
==========================================
  Files          45       48       +3     
  Lines        4148     4157       +9     
==========================================
+ Hits         2830     2835       +5     
- Misses       1318     1322       +4     

Flag	Coverage Δ
python-3.10	68.19% <58.60%> (-0.03%)	⬇️
python-3.9	68.23% <58.60%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[unkcpz]

Thanks @danielhollas, would you mind to separate the renaming in to a commit, it is a bit hard to see what had changed.

[danielhollas]

Thanks @danielhollas, would you mind to separate the renaming in to a commit

I am not quite sure what you mean, and not sure how to separate it. It's not really renaming, it's a code split. The backend code was moved from aiidalab_qe.common to aiidalab.setup.

For example, most of the code from aiidalab_qe/src/common/setup_code.py has been moved to aiidalab_qe/src/setup/code.py, except for the QeSetupWidget. Does that make sense?

[unkcpz]

Ah, okay, I thought it was rename and changes. If it is split, then nothing too much can be simplified. I am reviewing it.

[unkcpz]

Thanks @danielhollas, looking forward to see next PR how you invoke from CLI to avoid threading issue.