[cmake] CPMUtil: formatting, git_host, new repos, more system deps, libusb (#392)

I promise I'm a UI developer

- mbedtls can now be used as a system package
- zycore can now be used as a system package
- cleaned up dynarmic externals
- fixed libusb incorrectly showing as bundled
- add version/tag formatting to JSON
- add custom GIT_HOST option for packages
- moved some of my repos to my new git
- slightly better version identification
- combined VUL/VH since they are codependent (using my combo vendor)
- fix cpmfile inclusion
- remove libusb submodule

This PR succeeds #383 since it includes it

Co-authored-by: SDK Chan <sdkchan@eden-emu.dev>
Reviewed-on: #392
Co-authored-by: crueter <crueter@crueter.xyz>
Co-committed-by: crueter <crueter@crueter.xyz>

tools/cpm-fetch-all.sh

@@ -6,5 +6,6 @@
 # SPDX-FileCopyrightText: 2025 crueter
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-LIBS=$(find . externals externals/nx_tzdb src/yuzu/externals externals/ffmpeg src/dynarmic/externals -maxdepth 1 -name cpmfile.json -exec jq -j 'keys_unsorted | join(" ")' {} \; -printf " ")
+LIBS=$(find . externals src/yuzu/externals src/dynarmic -maxdepth 2 -name cpmfile.json -exec jq -j 'keys_unsorted | join(" ")' {} \; -printf " ")
+
 tools/cpm-fetch.sh $LIBS