Add --version and --help CLI flags to main.c

[felixx-sp]

Currently dmrcrack.exe always opens the GUI regardless of command-line arguments. This issue asks you to add two flags that print to the console and exit without opening the window:

• --version → prints FSP.DMRCrack 0.3.2 (use DMRCRACK_VERSION from include/version.h)
• --help → prints a one-line usage summary

Where to look: src/main.c → WinMain. Check lpCmdLine (or use GetCommandLineW + CommandLineToArgvW) before calling CreateWindowEx. Use AllocConsole + printf since it's a GUI subsystem binary.

Good first issue — no CUDA knowledge required, just Win32 entry point basics.