[headers 12] Add kaleido_manager.h, move various protos to headers (#2174)

* [headers 12] add kaleido_manager.h, move various protos to headers

* BSS

* bss

include/libc/string.h

@@ -7,5 +7,7 @@ char* strchr(const char*, int);
 size_t strlen(const char*);
 
 void* memcpy(void*, const void*, size_t);
+void* memmove(void* dest, const void* src, size_t len);
+void* memset(void* dest, int val, size_t len);
 
 #endif