Adding support for shutdown upon Ctrl+C on Windows for LLMP

[mkravchik]

This PR adds support shutdown upon Ctrl+C on Windows for LLMP. On Windows, Ctrl+C sent to console applications are not caught by the exception handler, but by a special CtrlHandler instead. I followed the design of Linux signal handlers and Windows exceptions handlers for the CtrlHandlers and integrated them in LLMP using the same approach as LlmpShutdownSignalHandler for unix

[domenukk]

Thanks! This just needs a pass of cargo fmt and one of cargo clippy :)

[tokatoka]

can you format? then i can merge it.
i'll maybe change the location of hanlder installation later on my side

[domenukk]

Somehow fmt still doesn't like you?

Diff in /home/runner/work/LibAFL/LibAFL/libafl/src/feedbacks/map.rs at line 547:
             }
         }*/
 
-
         let steps = size / VectorType::LEN;
         let left = size % VectorType::LEN;

[tokatoka]

there're more fmts to fix

[mkravchik]

I ran fmt at the root and fixed what ever it found. Hope this time it is OK.

[tokatoka]

the log says you need to run it in ./fuzzers/tutorial

[mkravchik]

What log?

[tokatoka]

https://github.com/AFLplusplus/LibAFL/actions/runs/7096462809/job/19315022927?pr=1704
I suppose you are not using nightly to fmt it

[mkravchik]

Finally fixed (I had to use nightly toolchain explicitly)