Function hexDecode

hexDecode(value?): string
Converts a hexadecimal string into its equivalent UTF-8 string.

This function takes a hexadecimal string as input, converts each pair of hexadecimal digits into the corresponding UTF-8 character, and concatenates the results to form the final string.
Parameters
- value: string = ""
  
  The hexadecimal string to be decoded. If not provided, an empty string will be used.
Returns string
The UTF-8 representation of the input hexadecimal string.
Example
```
// Decode a hexadecimal string into UTF-8
const utf8String = ix.api.text.hexDecode("666F6F426172");
console.log(utf8String);  // Outputs: "fooBar"
```