Add function to prepend pragmas to loops

Add a function to prepend #pragma directives to domain loops according to their nesting depth. Useful for compiler-specific annotations and interactions, especially with less well-known niche compilers (like Fujitsu's ARM-compiler).

added feature label

requested review from @holzer

assigned to @da15siwa

Maybe the PragmaBlock is also helpful in the MR: https://i10git.cs.fau.de/pycodegen/pystencils/-/blob/master/pystencils/astnodes.py#L416

resolved all threads

added 1 commit

• dcb7d28b - added pragma adding test

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added 3 commits

• dcb7d28b...c5c66fe0 - 2 commits from branch pycodegen:master
• d002371b - merge branch master

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merged

mentioned in commit 57f69df8