Implement consistent step blocker system

[edan-bainglass]

This PR includes the following:

• Wizard-related widgets/models are moved to common/wizard.py
• QeWizardStep and corresponding model are extended by a confirmable and dependent (and both) flavors
• A new HasBlockers mixin is provided to encapsulate the relevant traits and functionality
• The confirmable wizard step flavor takes a confirmable wizard step model with the Confirmable and HasBlockers mixins
• Steps 1-3 are now confirmable steps
• Steps 2-4 remain dependent steps
• Steps 2-3 inherit both sets of functionality
• The SSSP installation widget is moved to step 1 and is blocking (see below)
• The QE install / code setup widget remains in step 3 and is blocking (see below)
• HasBlockers mixin is added to SettingsModel (panels in steps 2 and 3 can now block)

The design is flexible, modular, and extensible. Following the already-implemented use case of step 1, blockers could by introduced in step 2 covering invalid parameter combinations. Similarly in step 3, in addition to the QE setup blockers, additional blockers could be introduced covering invalid resource selection.

Thank you to @superstar54 and @mikibonacci for feedback and input 🙏

Resolves #1151
Resolves #1152

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[codecov]

Codecov Report

Attention: Patch coverage is 85.06224% with 36 lines in your changes missing coverage. Please review.

Project coverage is 73.09%. Comparing base (6228414) to head (a429779).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/aiidalab_qe/common/wizard.py	84.42%	19 Missing ⚠️
src/aiidalab_qe/app/structure/__init__.py	75.86%	7 Missing ⚠️
src/aiidalab_qe/common/mixins.py	65.00%	7 Missing ⚠️
src/aiidalab_qe/common/panel.py	75.00%	2 Missing ⚠️
src/aiidalab_qe/app/main.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1171      +/-   ##
==========================================
+ Coverage   72.99%   73.09%   +0.09%     
==========================================
  Files          94       95       +1     
  Lines        6532     6578      +46     
==========================================
+ Hits         4768     4808      +40     
- Misses       1764     1770       +6     

Flag	Coverage Δ
python-3.11	73.09% <85.06%> (+0.09%)	⬆️
python-3.9	73.09% <85.06%> (+0.11%)	⬆️

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[edan-bainglass]

@cpignedoli this should hopefully resolve the issue you and I ran into. It should also improve UX quite a bit by allowing us to more easily prevent invalid runs. There is also the issue of @superstar54 (#1148) that will further improve UX!

[mikibonacci]

Hi @edan-bainglass, LGTM! the only additonal comment that you asked to write here is about triggering a refresh resources once the qe installation is finished (otherwise there is the risk to not see the new code, in step 3)

Thanks!

[edan-bainglass]

@mikibonacci can you check once more, see that indeed code selectors are refreshed and enabled on completed setup? 🙏

[mikibonacci]

LGTM!