Fixes #5044; commented LPE tool as it is experimental

The PR simply comments out Path Effects options in Menu Bar -> Path to resolve #5044

Additionally, I wanted to inquire about CRLF line breaks in the files. When going through the files, I found that many used CRLF in my local copy after cloning. Thus, when I tried compiling Inkscape, which I did with ninja for a Linux system, I encountered errors that I managed to fix by converting all the CRLF to LF. This PR does not include those changes of course, but I am confused as to why this happened in the first place, as I am under the impression that development is probably expected to be done on a unix-like system, thus the files would use LF. Could this somehow be related to the fact that I cloned the repository on a windows system, went through and edited the files on a windows system, but compiled them on a Windows Subsystem for Linux set up? I chose not to compile on Windows due to not clearly understanding how to get MSYS to work and therefore ran into a few issues with it. Furthermore, I was also a bit confused on compiling and testing; on one hand, CONTRIBUTING lines 72-102 recommend using ninja, whereas CONTRIBUTING lines 119-124 instruct running tests through cmake (via the wiki's guidelines). I would appreciate any and all guidance on this! Thank you!