[desktop] Allow deletion of add-ons from the add-on menu (#3626)

Adds a location param to the Patch struct which can be used to delete
any installed mods at the user's request. You can delete multiple at
once too, or just one by right-clicking

You are not able to delete game updates, DLC, or SDMC mods.

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3626
Reviewed-by: DraVee <dravee@eden-emu.dev>
Reviewed-by: Maufeat <sahyno1996@gmail.com>

src/core/file_sys/patch_manager.h

@@ -46,6 +46,7 @@ struct Patch {
     u64 program_id;
     u64 title_id;
     PatchSource source;
+    std::string location;
     u32 numeric_version{0};
 };