[hle/service] stub missing homebrew services, fix NPad/caps crashes (#4264)

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

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------

this PR adds various missing services (acc:e, acc:e:u1)
to expand homebrew compatibility
notably this also fixes NPad related crashes due to nullref

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4264
Reviewed-by: Maufeat <sahyno1996@gmail.com>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>

src/core/hle/service/ncm/ncm.cpp

@@ -427,11 +427,26 @@ private:
     }
 };
 
+class NCM_V final : public ServiceFramework<NCM_V> {
+public:
+    explicit NCM_V(Core::System& system_)
+        : ServiceFramework{system_, "ncm:v"}
+    {
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "GetSystemVersion"},
+        };
+        RegisterHandlers(functions);
+    }
+};
+
 void LoopProcess(Core::System& system) {
     auto server_manager = std::make_unique<ServerManager>(system);
 
     server_manager->RegisterNamedService("lr", std::make_shared<LR>(system));
     server_manager->RegisterNamedService("ncm", std::make_shared<NCM>(system));
+    if (1 /* not retail */) {
+        server_manager->RegisterNamedService("ncm:v", std::make_shared<NCM_V>(system));
+    }
     ServerManager::RunServer(std::move(server_manager));
 }