feat: cleaning of all the ssv_memory and ssvlib_demo to get a cleaner cps::lire_carte API

crates/sesam-vitale/src/main.rs

@@ -1,6 +1,7 @@
-mod ssvlib_demo;
+mod cps;
 mod libssv;
 mod ssv_memory;
+mod ssvlib_demo;
 
 fn main() {
     ssvlib_demo::demo();