Feature Request: Support C/C++ preprocessor directives (#if, #ifdef, #endif)

[setsuna-VL]

Description

Blockman currently does not recognize C/C++ preprocessor directives like #if, #ifdef, #ifndef, #elif, #else, and #endif as block boundaries.

Example Code

#ifdef DEBUG
    void debugLog() {
        printf("Debug mode\n");
        // This whole block is not highlighted as a unit
    }
#endif

#if defined(WIN32)
    // Windows specific code
#elif defined(LINUX)
    // Linux specific code
#endif

Expected Behavior
The #if / #endif blocks should be highlighted as nested blocks, similar to how curly brackets {} are handled.

Use Case
This would be very helpful for:

Large codebases with many conditional compilation blocks
Embedded systems development
Cross-platform code with many #ifdef PLATFORM blocks
Environment

VS Code version: 1.113.0 (user setup)
Blockman version: v1.7.8

Thank you for this great extension!