feat(libSceRudp): declare the calls PPSA06888 imports

PPSA06888 stops on main at start-up because its bundled
Media/Plugins/SceRudp.prx imports sceRudpEnableInternalIOThread2,
sceRudpGetOption and sceRudpGetRemoteInfo, which no library exports.

The signatures are unknown, so they are declared without parameters and
throw. The title does not call them during start-up.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

core/libs/prx/libSceRudp/Export.cpp

@@ -101,6 +101,11 @@ int APS5_VABI sceRudpEnableInternalIOThread(uint32_t stack_size, uint32_t priori
     return g_inited ? 0 : RUDP_ERROR_NOT_INITIALIZED;
 }
 
+int APS5_VABI sceRudpEnableInternalIOThread2() {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
 int APS5_VABI sceRudpSetEventHandler(GuestRudpEventHandler handler, void* arg) {
     std::lock_guard<std::mutex> lk(g_mutex);
     g_handler = handler;
@@ -150,6 +155,11 @@ int APS5_VABI sceRudpSetOption(int ctx_id, int option, const void* value, uint32
     return valid_ctx(ctx_id) ? 0 : RUDP_ERROR_INVALID_CONTEXT_ID;
 }
 
+int APS5_VABI sceRudpGetOption() {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
 int APS5_VABI sceRudpInitiate(int ctx_id, const void* to, uint32_t tolen, uint16_t vport) {
     (void)to;
     (void)tolen;
@@ -178,6 +188,11 @@ int APS5_VABI sceRudpGetContextStatus(int ctx_id, void* status, uint32_t size) {
     return 0;
 }
 
+int APS5_VABI sceRudpGetRemoteInfo() {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
 int APS5_VABI sceRudpGetNumberOfPacketsToRead(int ctx_id) {
     std::lock_guard<std::mutex> lk(g_mutex);
     if (!g_inited) {

docs/dev/TechnicalDebt.md

@@ -88,6 +88,7 @@ Throughout the project, every function at every stage either **does exactly what
 - PPSA23566 imports declared without parameters, signatures unknown: [sceAudioOut2UserGetSupportedAttributes](../../core/libs/prx/libSceAudioOut/src/AudioOut2System.cpp), [sceConvertKeycodeGetCharacterFromKeyboardData](../../core/libs/prx/libSceConvertKeycode/Export.cpp), [sce::Json::MemAllocator::notifyError](../../core/libs/prx/libSceJson2/Export.cpp), [sceNetResolverAbort](../../core/libs/prx/libSceNet/Export.cpp), [sceNpCommerceDialogOpen2](../../core/libs/prx/libSceNpCommerce/Export.cpp), [sceNpEntitlementAccessGetPftFlag](../../core/libs/prx/libSceNpEntitlementAccess/Export.cpp), [sceProprietaryVoiceChatHelper{Initialize,Terminate,SetVoiceChatState,GetVoiceChatUsageState}](../../core/libs/prx/libSceProprietaryVoiceChatHelperPrx/Export.cpp), [sceVoice{GetResourceInfo,ResetPort,EnableChat,DisableChat}](../../core/libs/prx/libSceVoice/Export.cpp). Names from the shadPS4 aerolib NID list
 - PPSA28416 imports declared without parameters, signatures unknown: [sceAudioOut2EnableChat](../../core/libs/prx/libSceAudioOut/src/AudioOut2System.cpp), imported by its bundled `party-ps5-shipping.prx`. Name from the shadPS4 aerolib NID list
 - PPSA08427 imports declared without parameters, signatures unknown: [sceNpEntitlementAccessGetGameTrialsFlag](../../core/libs/prx/libSceNpEntitlementAccess/Export.cpp), imported by its bundled `pros.sdk.Prospero.prx` and not called before the main menu. Name from the aerolib NID list
+- PPSA06888 imports declared without parameters, signatures unknown: [sceRudpEnableInternalIOThread2, sceRudpGetOption, sceRudpGetRemoteInfo](../../core/libs/prx/libSceRudp/Export.cpp) (libSceRudp), imported by its bundled `Media/Plugins/SceRudp.prx` and not called during start-up. Names from the NID table of [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/main/src/core/libraries/rudp/rudp.cpp), which declares them without parameters too
 - [sceVoiceChatRequestCreateVoiceChatGroup, sceVoiceChatRequestJoinVoiceChatGroup, sceVoiceChatRequestLeaveVoiceChatGroup, sceVoiceChatRequestDeleteVoiceChatGroup](../../core/libs/prx/libSceVoiceChat/Export.cpp) (libSceVoiceChat) - assumed to take a request id and two pointers like the other `sceVoiceChatRequest*` calls; offline, every argument is ignored and `SIGNED_OUT` is returned, as for those
 - [sceAvPlayerAddSource](../../core/libs/prx/libSceAvPlayer/src/Source.cpp) (libSceAvPlayer) - requests up to 4 additional decode-ahead video framebuffers from the memory replacement beyond `num_output_video_framebuffers` when memory is available; the console's internal buffering behaviour is unknown
 - [sceTextToSpeech2Initialize](../../core/libs/prx/libSceTextToSpeech2/Export.cpp) (libSceTextToSpeech2) - the console's error for an unavailable speech engine is unknown; it returns the kernel's `EOPNOTSUPP` (0x8002002D). PPSA01317 passes a param that starts with 0x2000000 and only tests the result for non-zero; the other exports it imports are declared without parameters