feat: resolve references

[lukarade]

Closes #90

Summary of Changes

This feature contains many additions to the collection of data when parsing python code (former scope detection).
We now collect: the scope, the classes, the functions, all global variables, all value and target nodes, the parameters as well as all function calls when traversing the AST.
During this traversal, we also determine the symbols for all name nodes.
We distinguish between GlobalVariables, LocalVariables, ClassVariables, InstanceVariables, Parameters and Builtins.

Furthermore, this feature resolves the references for all name nodes (target and value nodes).
For each name node we determine its scope, as mentioned above, and a list of all referenced symbols and return a ReferenceNode.

[codecov]

Codecov Report

Merging #153 (813a176) into main (45b1329) will increase coverage by 0.12%.
The diff coverage is 95.18%.

@@            Coverage Diff             @@
##             main     #153      +/-   ##
==========================================
+ Coverage   92.71%   92.83%   +0.12%     
==========================================
  Files          90       95       +5     
  Lines        5313     5794     +481     
==========================================
+ Hits         4926     5379     +453     
- Misses        387      415      +28     

Files	Coverage Δ
src/library_analyzer/cli/_run_api.py	100.00% <ø> (ø)
src/library_analyzer/processing/api/__init__.py	100.00% <ø> (ø)
.../library_analyzer/processing/api/model/__init__.py	100.00% <ø> (ø)
...nalyzer/processing/api/purity_analysis/__init__.py	100.00% <100.00%> (ø)
...er/processing/api/purity_analysis/_infer_purity.py	92.98% <100.00%> (ø)
...cessing/api/purity_analysis/_resolve_references.py	100.00% <100.00%> (ø)
...r/processing/api/purity_analysis/model/__init__.py	100.00% <100.00%> (ø)
...er/processing/api/purity_analysis/model/_purity.py	88.76% <ø> (ø)
...processing/api/purity_analysis/model/_reference.py	64.28% <64.28%> (ø)
...processing/api/purity_analysis/_get_module_data.py	97.58% <97.58%> (ø)
... and 1 more

... and 2 files with indirect coverage changes

[lars-reimann]

Please fix the warnings that occur when building the documentation:

WARNING -  griffe: src/library_analyzer/processing/api/purity_analysis/_resolve_references.py:348: Could not parse line '    * code: the code of the module for which we want to resolve the references'
WARNING -  griffe: src/library_analyzer/processing/api/purity_analysis/_resolve_references.py:348: Empty parameters section at line 9

[lars-reimann]

Very nice work, thanks a lot!