Change behaviour of namespaces so they are at the module level.

[hmgaudecker]

What problem do you want to solve?

The way we implemented the loading of namespaces in #780 does not quite work.

We want to have them at the directory level to balance use of namespaces and reducing the amount of qualified names.

[codecov]

Codecov Report

Attention: Patch coverage is 73.91304% with 6 lines in your changes missing coverage. Please review.

Please upload report for BASE (collect-components-of-namespaces@6c6c015). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/_gettsim/shared.py	62.50%	3 Missing ⚠️
src/_gettsim/functions/loader.py	80.00%	2 Missing ⚠️
src/_gettsim/interface.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                         Coverage Diff                         @@
##             collect-components-of-namespaces     #818   +/-   ##
===================================================================
  Coverage                                    ?   48.52%           
===================================================================
  Files                                       ?       55           
  Lines                                       ?     4004           
  Branches                                    ?        0           
===================================================================
  Hits                                        ?     1943           
  Misses                                      ?     2061           
  Partials                                    ?        0           

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[hmgaudecker]

Thanks for the update, makes perfect sense!