feat(services): Implement nn::socket, nn::nifm, and nn::nim networking services

Add Nintendo Switch network service implementations to support modders
working with network functionality in their game modifications:

- Add nn::socket utilities including InetAton and Connect functions
- Implement sockaddr/in_addr structures matching official Nintendo APIs
- Add nn::nifm networking interface services with IsNetworkAvailable and SubmitNetworkRequest
- Implement nn::nim network installation management services
- Fix BSD socket implementation to properly handle proxy packets
- Add Service_BSD log category for better debugging

These changes provide crucial networking API support for modders like
MaxLastBreath and projects like NX Optimizer (https://www.nxoptimizer.com/)
that need to hook into Nintendo's network services for code injection mods.
This implementation follows the official documentation at SwitchBrew and
enables proper network connectivity in modded games.

Signed-off-by: Zephyron <zephyron@citron-emu.org>

src/core/hle/service/nim/nim.cpp

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <chrono>
@@ -8,6 +9,7 @@
 #include "core/hle/service/ipc_helpers.h"
 #include "core/hle/service/kernel_helpers.h"
 #include "core/hle/service/nim/nim.h"
+#include "core/hle/service/nim/nim_utils.h"
 #include "core/hle/service/server_manager.h"
 #include "core/hle/service/service.h"