Implement JsDataView (#2308)

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This Pull Request is related to #2098 .

It changes the following:

- Implements a wrapper for `DataView`
- Adds an example of `JsDataView` to the `JsArrayBuffer` example file under boa_examples


Co-authored-by: jedel1043 <[email protected]>

boa_engine/src/builtins/dataview/mod.rs

@@ -15,9 +15,9 @@ use tap::{Conv, Pipe};
 
 #[derive(Debug, Clone, Trace, Finalize)]
 pub struct DataView {
-    viewed_array_buffer: JsObject,
-    byte_length: u64,
-    byte_offset: u64,
+    pub(crate) viewed_array_buffer: JsObject,
+    pub(crate) byte_length: u64,
+    pub(crate) byte_offset: u64,
 }
 
 impl BuiltIn for DataView {