Refactor: split the original generate_features.py module

[neomatrix369]

Refactor: split the original generate_features.py and extract the parallelisation aspect into a module of it's own

Related to issue #28, and partially resolves it (reduces complexity)

[neomatrix369]

@sourcery-ai in the above report it would be helpful to find out what those recommended/suggested changes are, which areas in the code these changes can be brought about

The before and after changes report/comparison maybe a bit counter-intuitive if compared to the changes made in the code base

[sourcery-ai]

Sourcery Code Quality Report

This PR has an average code quality of 85.18%

Quality metrics	Before	After	Change
Complexity		1.00 ⭐
Method Length		37.00 ⭐
Working memory		7.00 🙂
Quality	%	85.18% ⭐	%

Other metrics	Before	After	Change
Lines		27

Changed files	Quality Before	Quality After	Quality Change
nlp_profiler/generate_features/init.py		85.18% ⭐

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
nlp_profiler/generate_features/init.py	generate_features	2 ⭐	62 🙂	11 😞	70.70% 🙂	Extract out complex expressions

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[codecov-io]

Codecov Report

Merging #29 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #29   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           20        21    +1     
  Lines          358       360    +2     
  Branches        51        51           
=========================================
+ Hits           358       360    +2     

Impacted Files	Coverage Δ
nlp_profiler/generate_features/__init__.py	100.00% <100.00%> (ø)
...erate_features/parallelisation_methods/__init__.py	100.00% <100.00%> (ø)

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[neomatrix369]

Merging, for now, will use the @sourcery-ai generated PRs as guidance to refractor further