refactor: rename PIP_NO_\* to PIP_HAS_\* with inverted logic

All feature flags now use positive naming (enabled by default):
- PIP_HAS_FILESYSTEM, PIP_HAS_THREADS, PIP_HAS_SOCKET
- PIP_HAS_PROCESS, PIP_HAS_DYNLIB, PIP_HAS_FFT, PIP_HAS_SERIAL

Preprocessor guards inverted:
- #ifndef PIP_NO_X → #ifdef PIP_HAS_X
- #ifdef PIP_NO_X → #ifndef PIP_HAS_X

CMake options default ON instead of OFF.
Platform blocks set flags OFF to disable features.

85 files transformed via Python script + 2 manual fixes.

libs/main/io_devices/pibinarylog.h

@@ -29,7 +29,7 @@
 #include "pichunkstream.h"
 #include "pifile.h"
 
-#ifndef PIP_NO_FILESYSTEM
+#ifdef PIP_HAS_FILESYSTEM
 
 //! \~english Class for writing and reading binary data to/from log files, with support for playback in different modes.
 //! \~russian Класс для записи и чтения бинарных данных в/из файлов логов с поддержкой воспроизведения в различных режимах.
@@ -993,5 +993,5 @@ inline PICout operator<<(PICout s, const PIBinaryLog::BinLogInfo & bi) {
 	return s;
 }
 
-#endif // PIP_NO_FILESYSTEM
+#endif // PIP_HAS_FILESYSTEM
 #endif // PIBINARYLOG_H