[cmake, docs, tools] update CPMUtil (#3183)

Rewrote the entire tooling scheme. That's about it, just make sure
tooling works as expected everywhere.

Signed-off-by: crueter <crueter@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3183
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: Lizzie <lizzie@eden-emu.dev>

src/dynarmic/CMakeLists.txt

@@ -2,7 +2,12 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 cmake_minimum_required(VERSION 3.12)
-project(dynarmic LANGUAGES C CXX ASM VERSION 6.7.0)
+
+set(dynarmic_VERSION_MAJOR 7)
+set(dynarmic_VERSION_MINOR 0)
+set(dynarmic_VERSION_PATCH 0)
+
+set(dynarmic_VERSION ${dynarmic_VERSION_MAJOR}.${dynarmic_VERSION_MINOR}.${dynarmic_VERSION_PATCH})
 
 # Determine if we're built as a subproject (using add_subdirectory)
 # or if this is the master project.
@@ -46,7 +51,7 @@ if ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
 endif()
 
 # Add the module directory to the list of paths
-list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/CMakeModules")
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules")
 
 # Compiler flags
 if (MSVC)