Crates io (#76)

* crates re-organisation

* fixed typo in layout & added test for vmp_apply

* updated dependencies

poulpy-schemes/src/tfhe/blind_rotation/key_prepared.rs

@@ -1,4 +1,4 @@
-use poulpy_backend::hal::{
+use poulpy_hal::{
     api::{SvpPPolAlloc, SvpPrepare, VmpPMatAlloc, VmpPrepare},
     layouts::{Backend, Data, DataMut, DataRef, Module, ScalarZnx, Scratch, SvpPPol},
 };