Change code style to black

Change the style of the whole code to black. Add a pipeline which checks for black compliance.

added improvement label

requested review from @m.hock

assigned to @hannes.mayr

added 1 commit

• 6d26b812 - Add type checking.

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added 1 commit

• 816b0e92 - Add type checking.

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mentioned in issue #96 (closed)

mentioned in commit db346d3c

merged