Documentation translation (Polish): Update kdegraphics documentation
completed by: Tomasz Madycki
mentors: Marta Rybczyńska
"Update documentation of the kdegraphics package: gwenview, kolourpaint, kruler, ksnapshot, okular. Approx 200 messages.
Expected results: All strings are translated and it builds correctly.
Prerequisites: Basic knowledge of shell to be able to run commands that build the documentation (will provide guidelines), basic knowledge of the programs."