Function parseDcborItem

parseDcborItem(src: string): ParseResult<Cbor>
Parses a dCBOR item from a string input.

This function takes a string slice containing a dCBOR diagnostic notation encoded value and attempts to parse it into a Cbor object. If the input contains extra tokens after a valid item, an error is returned.
Parameters
- src: string
  A string containing the dCBOR-encoded data.
Returns ParseResult<Cbor>
Ok(Cbor) if parsing is successful and the input contains exactly one valid dCBOR item, which itself might be an atomic value like a number or string, or a complex value like an array or map. Err(ParseError) if parsing fails or if extra tokens are found after the item.
Example
```
const result = parseDcborItem("[1, 2, 3]");
if (result.ok) {
  console.log(result.value.toDiagnostic()); // "[1, 2, 3]"
}
```
- Defined in parse.ts:44