[desktop] feat: install firmware from ZIP (#52)

Closes #12

Adds a menu option to install firmware from a packed ZIP.

This PR additionally lays the groundwork to add data import/export via ZIP. In the future, a qt_common subproject should be added to handle common Qt tasks such as this.

Furthermore, to decrease dependency complexity, this also introduces CPM, a wrapper around FetchContent. In theory, this should also lay the groundwork for #8 as well.

Signed-off-by: crueter <[email protected]>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/52

.gitignore

@@ -52,4 +52,3 @@ Thumbs.db
 eden-windows-msvc
 artifacts
 *.AppImage*
-*.patch