Add plugin entry point to workchain

[superstar54]

This PR uses bands property as an example to implement plugin design into the workchain.

• to avoid cyclic import, I moved the plugins and common folders out from the app. This is also reasonable since both of them do not belong to the app.
• Expose input and output of plugin workchain
• run_plugin method to run all plugins in parallel.
  • pros: run plugins in parallel
  • cons: can not set dependency between plugins, e.g. share the scf foder between bands and pdos.

[unkcpz]

? 😸

[codecov]

Codecov Report

Patch coverage: 59.50% and project coverage change: +3.04% 🎉

Comparison is base (6716091) 56.68% compared to head (8e20da4) 59.73%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #458      +/-   ##
==========================================
+ Coverage   56.68%   59.73%   +3.04%     
==========================================
  Files          28       36       +8     
  Lines        2415     2826     +411     
==========================================
+ Hits         1369     1688     +319     
- Misses       1046     1138      +92     

Flag	Coverage Δ
python-3.10	59.73% <59.50%> (+3.04%)	⬆️
python-3.8	59.77% <59.50%> (+3.03%)	⬆️
python-3.9	59.77% <59.50%> (+3.03%)	⬆️

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Files Changed	Coverage Δ
src/aiidalab_qe/common/__init__.py	100.00% <ø> (ø)
src/aiidalab_qe/common/node_view.py	42.64% <ø> (ø)
src/aiidalab_qe/common/process.py	30.23% <ø> (ø)
src/aiidalab_qe/common/widgets.py	31.74% <ø> (ø)
src/aiidalab_qe/app/result/workchain_viewer.py	23.20% <6.66%> (-1.50%)	⬇️
src/aiidalab_qe/app/configuration/__init__.py	32.52% <8.00%> (-3.29%)	⬇️
src/aiidalab_qe/plugins/bands/result.py	33.33% <33.33%> (ø)
src/aiidalab_qe/workflows/__init__.py	50.00% <49.09%> (+1.85%)	⬆️
src/aiidalab_qe/plugins/bands/setting.py	50.00% <50.00%> (ø)
src/aiidalab_qe/common/panel.py	75.55% <75.55%> (ø)
... and 11 more

... and 3 files with indirect coverage changes

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[unkcpz]

Perfect! Very clear now, thanks!

[unkcpz]

Remove this before merging.

[unkcpz]

Wait, seems there is a failed test, and it is caused by the plugin design. You can go and check the screenshot of the module loading failure in https://github.com/aiidalab/aiidalab-qe/actions/runs/6085956137?pr=458 (By download the artifact screenshot)

[superstar54]

Wait, seems there is a failed test, and it is caused by the plugin design.

Thanks for pointing out this. It was solved by adding __init__.py file to the plugins folder.