Create JavascriptString variable from Utf16 string

CHAKRA_API JsCreateStringUtf16( _In_ const uint16_t *content, _In_ size_t length, _Out_ JsValueRef *value); 

• content: Pointer to string memory.
• length: Number of bytes within the string
• value: JsValueRef representing the JavascriptString

The code JsNoError if the operation succeeded, a failure code otherwise.

This API is experimental and may have breaking change later.

Requires an active script context.

Expects Utf16 string.