Add fuzzy string matching to pyprobe.result.Result.get() method

The `pyprobe.result.Result.get()` method should support fuzzy string matching to enhance usability when querying for results with approximate or similar string keys. This feature will help users retrieve values even when there are minor typos or differences in the key strings, making the method more robust and user-friendly. Consider using a library like `fuzzywuzzy` or Python's `difflib` for the implementation. Include tests and documentation for the new fuzzy matching capability.

Example. `result.get("Voltage (V)")` should return a "did you mean `"Voltage [V]"`.

Start with the pyprobe.result.Result.get() method and review how result keys are currently queried. Compare Python's difflib and fuzzywuzzy as possible approaches, then add tests and documentation covering approximate keys such as "Voltage (V)" matching "Voltage [V]"; done means the documented fuzzy lookup works and existing lookups remain covered.

Written by the indexing model from the issue text.