refactor: migrate MICRO_PIP to fine-grained feature flags

Replace monolithic MICRO_PIP/PIP_MICRO with granular flags:

Feature flags (CMake options + platform auto-detection):
- PIP_NO_FILESYSTEM, PIP_NO_THREADS, PIP_NO_SOCKET
- PIP_NO_PROCESS, PIP_NO_DYNLIB, PIP_NO_FFT, PIP_NO_SERIAL

Embedded optimization flag:
- PIP_EMBEDDED (auto-set for Pico SDK and FreeRTOS)
  Controls buffer sizes, time stubs, terminal fallback, init stubs

Platform blocks in CMakeLists.txt:
- Pico SDK: auto-disables FS, PROCESS, DYNLIB, FFT, SERIAL;
  conditionally disables THREADS (no FreeRTOS) and SOCKET (no LWIP)
- FreeRTOS: auto-disables FS, PROCESS, DYNLIB, FFT, SERIAL;
  conditionally disables SOCKET (no LWIP)
- Android: auto-disables PROCESS, DYNLIB, FFT

Updated 96 files across libs/, utils/, tests/, and CMakeLists.txt.
Builds verified for Linux (547 tests pass) and Pico SDK (100%).
Removed all MICRO_PIP and PIP_MICRO references (0 remaining).

libs/main/console/piscreen.h

@@ -34,6 +34,7 @@
 //! \~\brief
 //! \~english Console screen manager with tile layout, drawing, and input routing.
 //! \~russian Менеджер консольного экрана с раскладкой тайлов, отрисовкой и маршрутизацией ввода.
+#if !defined(PICO_SDK)
 class PIP_CONSOLE_EXPORT PIScreen
 	: public PIThread
 	, public PIScreenTypes::PIScreenBase {
@@ -177,14 +178,14 @@ private:
 		void showCursor();
 		void clearScreen();
 		void clearScreenLower();
-#ifdef WINDOWS
+#  ifdef WINDOWS
 		void getWinCurCoord();
 		void clearLine();
 		void newLine();
 		ushort attributes(const PIScreenTypes::Cell & c);
-#else
+#  else
 		PIString formatString(const PIScreenTypes::Cell & c);
-#endif
+#  endif
 		PRIVATE_DECLARATION(PIP_CONSOLE_EXPORT)
 		int width, height, pwidth, pheight;
 		int mouse_x, mouse_y;
@@ -214,6 +215,6 @@ private:
 	PIScreenTile root;
 	PIScreenTile *tile_focus, *tile_dialog;
 };
-
+#endif // !PICO_SDK
 
 #endif // PISCREEN_H