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Implements 150+ missing functions across Account (acc:*) and LDN (ldn:*, lp2p:*) services based on official SwitchBrew documentation. Account Services (acc:su, acc:e, acc:u0, acc:u1, acc:e:u1, acc:e:u2, dauth:0): - Add 70+ missing functions including notifiers, async operations, and OAuth procedures - Implement GetUserRegistrationNotifier, GetUserStateChangeNotifier, GetProfileUpdateNotifier - Add thumbnail management (LoadSaveDataThumbnail, GetSaveDataThumbnailExistence) - Implement user management (DeleteUser, SetUserPosition, CancelUserRegistration) - Add Nintendo Account procedures (CreateFloatingRegistrationRequest, etc.) - Implement device migration functions (19.0.0+, 20.0.0+) - Add debug functions for user qualification and token cache management IManagerForApplication/SystemService (19.0.0+ compatibility): - Rename LoadIdTokenCache (cmd 3) to LoadIdTokenCacheDeprecated - Add new LoadIdTokenCache (cmd 4) with updated signature - Add GetNintendoAccountUserResourceCache (cmd 136) LDN Services (ldn:m, ldn:s, ldn:u): - Add 80+ missing functions across all LDN interfaces - Implement CreateClientProcessMonitor (cmd 1) for ldn:s and ldn:u (18.0.0+) - Create IClientProcessMonitor service with RegisterClient function - Implement IMonitorService functions (GetNetworkInfoForMonitor, GetIpv4AddressForMonitor, etc.) - Implement ISystemLocalCommunicationService (GetState, Scan, Connect, Initialize, etc.) LP2P Services (lp2p:app, lp2p:sys, lp2p:m): - Implement ISfService functions (Initialize, Scan, CreateGroup, etc.) - Implement ISfServiceMonitor (GetGroupInfo, GetMembers, AttachJoinEvent, etc.) - Implement ISfMonitorService (GetLinkLevel) Technical Changes: - Change non-domain (C<>) to domain (D<>) functions in LDN to fix crashes - Add enhanced error messaging to cmif_serialization.h for debugging - Create client_process_monitor.cpp/.h for IClientProcessMonitor - Add concrete async context implementations (EnsureSignedDeviceIdentifierCacheAsyncInterface, etc.) - Add Kernel::KReadableEvent forward declarations All functions properly stubbed with appropriate logging for future implementation. References: - https://switchbrew.org/wiki/Account_services - https://switchbrew.org/wiki/LDN_services Fixes 'Pokemon: Legends Z-A' LDN initialization crashes and improves compatibility with games using Account and Local Network services. Signed-off-by: Zephyron <zephyron@citron-emu.org>