Integrate LZ4 library, compress the ramdisk

kernel/libk/string.h

@@ -4,14 +4,23 @@
 #include <libk/std.h>
 
 size_t memset (void* dst, uint8_t b, size_t n);
-size_t memcpy (void* dst, const void* src, size_t n);
+
+void* memcpy (void* dst, const void* src, size_t n);
+
 void strncpy (char* dst, const char* src, size_t n);
+
 size_t strlen (const char* str);
+
 int memcmp (const void* s1, const void* s2, size_t n);
+
 int strncmp (const char* s1, const char* s2, size_t n);
+
 int strcmp (const char* s1, const char* s2);
+
 char* strncat (char* dest, const char* src, size_t n);
 
+void* memmove (void* dest, const void* src, unsigned int n);
+
 #define strlen_null(x) (strlen ((x)) + 1)
 
 #endif // _KERNEL_LIBK_STRING_H