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.

interface/CMakeLists.txt

@@ -1,7 +1,11 @@
+cmake_minimum_required(VERSION 3.31)
+project(rosetta-interface)
+
+include(Msg-Interface)
+
 file(GLOB if_files *.xpc)
 
 foreach (file ${if_files})
 	get_filename_component(name ${file} NAME_WLE)
 	add_interface(NAME ${name} PATH ${file} PARENT_DIR rosetta)
-	sysroot_add_interface(NAME ${name} DEST_DIR /usr/include)
 endforeach (file)