Getting rid of docs folder

[Markus-Goetz]

Description

Gets rid of the docs folder. PR template now in .github folder

Issue/s resolved: #532

Changes proposed:

• Removing docs folder
• PR template now in .github folder

Type of change

Remove irrelevant options:

• Documentation update

Due Diligence

• All split configurations tested
• Multiple dtypes tested in relevant functions
• Documentation updated (if needed)
• Updated changelog.md under the title "Pending Additions"

Does this change modify the behaviour of other functions? If so, which?

no

[codecov]

Codecov Report

Merging #536 into master will not change coverage by %.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #536   +/-   ##
=======================================
  Coverage   96.28%   96.28%           
=======================================
  Files          75       75           
  Lines       14541    14541           
=======================================
  Hits        14001    14001           
  Misses        540      540           

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[bhagemeier]

That's an even better solutiuon than what we had in mind earlier. Doesn't require any changes to the workflow of generating documentation automatically.