meta: replace cmake mono-build system with a custom build co-ordinator

every system component now has its own self-contained build system, and a
seed file describing the component and its build system and dependencies.

a new tool, meadow, collects and uses these seed files to build the
components into a full system. meadow also manages the target system root
and a host prefix where toolchain tools are installed to.

the build system has also been updated to use a new $ARCH-rosetta-gcc
compiler, and the patches files necessary to build it have been
added to toolchain/cross-compiler.

lib/librosetta/CMakeLists.txt

@@ -1,15 +1,13 @@
+cmake_minimum_required(VERSION 3.31)
+project(librosetta C ASM)
+
 file(GLOB sources *.c)
 file(GLOB headers include/rosetta/*.h)
 
-rosetta_add_library(
-	NAME librosetta STATIC
-	PUBLIC_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/include
-	SOURCES ${sources}
-	HEADERS ${headers})
+add_library(rosetta STATIC ${sources} ${headers})
+target_include_directories(rosetta PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)
 
-sysroot_add_library(
-	NAME librosetta
-	HEADER_DIR /usr/include
-	LIB_DIR /usr/lib)
+target_link_libraries(rosetta PRIVATE libmagenta)
 
-target_link_libraries(librosetta PRIVATE libmagenta)
+install(TARGETS rosetta)
+install(FILES ${headers} DESTINATION include/rosetta)