feat(integer): Adds bitslice operation

tfhe/src/error.rs

@@ -65,3 +65,12 @@ impl From<std::convert::Infallible> for Error {
         unreachable!()
     }
 }
+
+/// Error returned when the provided range for a slice is invalid
+#[derive(Debug)]
+pub enum InvalidRangeError {
+    /// The upper bound of the range is greater than the size of the integer
+    SliceTooBig,
+    /// The upper gound is smaller than the lower bound
+    WrongOrder,
+}

tfhe/src/integer/server_key/radix/mod.rs

@@ -7,6 +7,7 @@ mod scalar_add;
 pub(super) mod scalar_mul;
 pub(super) mod scalar_sub;
 mod shift;
+pub(super) mod slice;
 mod sub;
 
 use super::ServerKey;