feat: add bitwise ops for BooleanBufferBuilder and for MutableBuffer

arrow-buffer/src/buffer/immutable.rs

@@ -524,6 +524,12 @@ impl std::ops::Deref for Buffer {
     }
 }
 
+impl AsRef<[u8]> for &Buffer {
+    fn as_ref(&self) -> &[u8] {
+        self.as_slice()
+    }
+}
+
 impl From<MutableBuffer> for Buffer {
     #[inline]
     fn from(buffer: MutableBuffer) -> Self {

arrow-buffer/src/buffer/mod.rs

@@ -25,6 +25,7 @@ mod mutable;
 pub use mutable::*;
 mod ops;
 pub use ops::*;
+mod mutable_ops;
 mod scalar;
 pub use scalar::*;
 mod boolean;

arrow-buffer/src/buffer/mutable.rs

@@ -743,6 +743,12 @@ impl std::ops::DerefMut for MutableBuffer {
     }
 }
 
+impl AsRef<[u8]> for &MutableBuffer {
+    fn as_ref(&self) -> &[u8] {
+        self.as_slice()
+    }
+}
+
 impl Drop for MutableBuffer {
     fn drop(&mut self) {
         if self.layout.size() != 0 {