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>

This commit implements various network services required for newer firmware
versions. Key changes include:

- Add bsd:nu service for firmware 15.0.0+ with proper event handling
- Add bsdcfg implementation with complete interface declarations
- Add dns:priv and ethc (c/i) services
- Register all new services in the service manager
- Extend BSD implementation with additional socket operations
- Remove room_network instance variable in favor of system.GetRoomNetwork()
- Fix kernel event creation by using ServiceContext in all appropriate places
- Update build system to include new source files

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

service: hid: Migrate HidServer to new IPC

aoc: Migrate to use cmif serialization