introduce a stable NTL_DDK driver ABI to replace direct HAL_API and kernel-header access in drivers, add code/kernel/io_ddk.c and code/public/ntlite/ddk/ headers, change DriverEntry to take (const NTL_DDK*, NTL_DRIVER_INIT*), update kmain to build the DDK once via IoInitializeDdk/IoGetDdk and hand it to both boot and runtime drivers, downgrade code/public/ntlite/ddi/io_driver.h to a legacy I/O model header pulling from ntlite/ddk instead of kernel internals, move code/third_party/lwip into code/drivers/net/lwip/third_party, fix up lwip_sources.txt and build.c include paths to match, split build.c's single CFLAGS macro into COMMON/KERNEL/USER/BOOT/DRIVER cflags.

code/kernel/kmain.c

@@ -23,6 +23,7 @@
 #include <kernel/ldr_image.h>
 #include <ntlite/ddi/hal_api.h>
 #include <kernel/io_file.h>
+#include <kernel/io_ddk.h>
 #include <kernel/ke_selftest.h>
 #include <kernel/ke_smp.h>
 #include <kernel/ke_input.h>
@@ -122,7 +123,7 @@ static void KiInitializeSwapFromSettings(void) {
     }
 }
 
-typedef KSTATUS (*DRIVER_ENTRY_FN)(const HAL_API *);
+typedef KSTATUS (*DRIVER_ENTRY_FN)(const NTL_DDK* ddk, NTL_DRIVER_INIT* init);
 
 // HAL pointer cached at boot for subsystems that still need platform services.
 static const HAL_API* gKmainHal;
@@ -190,6 +191,8 @@ static void KiDriversIniCb(const char* section, const char* key,
 
 // Initializes drivers.
 static void KiInitializeDrivers(BOOT_INFO* bootInfo, const HAL_API* hal) {
+    (void)hal;
+    const NTL_DDK* ddk = IoGetDdk();
     DbgPrint("KiInitializeDrivers: Initializing drivers...\n");
     
     // boot drivers (provided by the bootloader).
@@ -230,7 +233,8 @@ static void KiInitializeDrivers(BOOT_INFO* bootInfo, const HAL_API* hal) {
         // Execute Entry Point.
         DRIVER_ENTRY_FN entry = (DRIVER_ENTRY_FN)LdrGetEntryPoint(mappedBase);
         if (entry) {
-            KSTATUS ds = entry(hal);
+            NTL_DRIVER_INIT init = {0};
+            KSTATUS ds = entry(ddk, &init);
             if (!KSUCCESS(ds)) {
                 DbgPrint("WARNING: Driver %s returned failure status 0x%X\n", mod->Name, ds);
             }
@@ -326,7 +330,8 @@ static void KiInitializeDrivers(BOOT_INFO* bootInfo, const HAL_API* hal) {
 
         DRIVER_ENTRY_FN entry = (DRIVER_ENTRY_FN)(LdrGetEntryPoint(mappedBase));
 
-        KSTATUS ds = entry(hal);
+        NTL_DRIVER_INIT init = {0};
+        KSTATUS ds = entry(ddk, &init);
         if (!KSUCCESS(ds)) {
             DbgPrint("KiInitializeDrivers: Driver %s failed to init!\n", runtimeKeys[i]);
         }
@@ -523,6 +528,7 @@ extern void KernelMain(BOOT_INFO* bootInfo) {
         HalStopProcessor();
 
     const HAL_API* hal = HalGetApi();
+    IoInitializeDdk(hal);
     gKmainHal = hal;
 
     KeInitDebug(hal, bootInfo->Debug);