feat(hlapi): Get num_bits from FheUint* types

tfhe/src/high_level_api/booleans/base.rs

@@ -96,6 +96,10 @@ impl FheBool {
         self.ciphertext.current_device()
     }
 
+    pub fn num_bits() -> usize {
+        1
+    }
+
     /// Moves (in-place) the ciphertext to the desired device.
     ///
     /// Does nothing if the ciphertext is already in the desired device

tfhe/src/high_level_api/integers/signed/base.rs

@@ -106,6 +106,10 @@ where
         }
     }
 
+    pub fn num_bits() -> usize {
+        Id::num_bits()
+    }
+
     /// Moves (in-place) the ciphertext to the desired device.
     ///
     /// Does nothing if the ciphertext is already in the desired device

tfhe/src/high_level_api/integers/unsigned/base.rs

@@ -151,6 +151,10 @@ where
         }
     }
 
+    pub fn num_bits() -> usize {
+        Id::num_bits()
+    }
+
     pub(in crate::high_level_api) fn move_to_device_of_server_key_if_set(&mut self) {
         self.ciphertext.move_to_device_of_server_key_if_set();
     }