[tools, cmake] refactor: update/hash check scripts, use tags for some more deps, proper CPMUtil separation (#2666)

Uses tags for a bunch of deps that can use them

Also adds a bunmch of scripts to tools/cpm, notably for checking hashes
and checking for updates.

TODO for the future:
- CI target to check hashes
- Weekly CI to check for updates

Need to get that other CI runner up

additional stuff

- Ports gentoo fixes
- makes solaris work (TODO: sdl2)
- way better docs
- properly separates CPMUtil as a standalone project

Reviewed-on: eden-emu/eden#2666
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

tools/reset-submodules.sh

@@ -1,8 +0,0 @@
-#!/bin/bash -ex
-
-# SPDX-FileCopyrightText: 2024 yuzu Emulator Project
-# SPDX-License-Identifier: MIT
-
-git submodule sync
-git submodule foreach --recursive git reset --hard
-git submodule update --init --recursive