Implement structure style clusters

[tefra]

Some schemas out there are simply huge and the generated modules are also huge, making them almost impossible to work with during development but also cause huge load times even when only a small fraction of classes are needed by document type.

Obviously it's impossible in python to go the one class per file way due to circular imports but we can group strongly coupled classes together in an effort to create smaller modules.

Algorithm: http://code.activestate.com/recipes/578507/

Steps:

• Decouple mappers from module/package assignment
• Move designation process inside the the class analyzer
• Verify that everything still works
• Add new style
• Test again all samples with new style

[codecov]

Codecov Report

Merging #509 (c75e6bb) into master (5bf4a87) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #509   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           84        86    +2     
  Lines         7412      7478   +66     
  Branches      1299      1308    +9     
=========================================
+ Hits          7412      7478   +66     

Impacted Files	Coverage Δ
xsdata/cli.py	100.00% <ø> (ø)
xsdata/codegen/handlers/class_bare_inner.py	100.00% <ø> (ø)
xsdata/models/mixins.py	100.00% <ø> (ø)
xsdata/codegen/analyzer.py	100.00% <100.00%> (ø)
xsdata/codegen/container.py	100.00% <100.00%> (ø)
xsdata/codegen/handlers/__init__.py	100.00% <100.00%> (ø)
xsdata/codegen/handlers/attribute_default_value.py	100.00% <100.00%> (ø)
xsdata/codegen/handlers/attribute_group.py	100.00% <100.00%> (ø)
xsdata/codegen/handlers/attribute_overrides.py	100.00% <100.00%> (ø)
xsdata/codegen/handlers/attribute_substitution.py	100.00% <100.00%> (ø)
... and 22 more

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[tefra]

I am really excited about this one, first all one of the ugliest parts of the process now has moved into the analyzer process instead of running after the mapping process out of place and secondly this style is the closest thing to one class per file for python

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[tefra]

This also fixes an issue with the netex collection failing to discover one derived typed 🧨