arm64: SDL/kmsdrm frontend, headless runners, and handheld defaults (fork-only)

pcsx2-sdl (SDL3/kmsdrm handheld frontend), pcsx2-eerunner / pcsx2-vurunner headless
JIT regression+divergence tools, the gsrunner libmali CLI flags + Wayland scanner
wiring, and the heterogeneous-CPU thread-pinning default. Fork-only tooling/frontends.

Co-Authored-By: Ryan Walklin <ryan@testtoast.com>
Co-Authored-By: Brian Degenhardt <bmd@bmdhacks.com>
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

pcsx2-eerunner/CMakeLists.txt

@@ -0,0 +1,22 @@
+add_executable(pcsx2-eerunner)
+
+if (PACKAGE_MODE)
+	install(TARGETS pcsx2-eerunner DESTINATION ${CMAKE_INSTALL_BINDIR})
+else()
+	install(TARGETS pcsx2-eerunner DESTINATION ${CMAKE_SOURCE_DIR}/bin)
+endif()
+
+target_sources(pcsx2-eerunner PRIVATE
+	Main.cpp
+)
+
+target_include_directories(pcsx2-eerunner PRIVATE
+	"${CMAKE_BINARY_DIR}/common/include"
+	"${CMAKE_SOURCE_DIR}/pcsx2"
+	"${CMAKE_SOURCE_DIR}/tests/ctest/core/recompilers"
+)
+
+target_link_libraries(pcsx2-eerunner PRIVATE
+	PCSX2_FLAGS
+	PCSX2
+)