Feature: Error message pointer inside XPath selectors

[piotrkluz]

Feature that will point which element inside XPath selector has not found.
Actual behaviour points to entire selector (("My text" is not exist)

form.someClass >> .//select/option[contains(.,'My text')]
                  ^
                  Element not found

Expected behaviour:

form.someClass >> .//select/option[contains(.,'My text')]
                  ^         ^
                  |         Not found 'option[contains(.,'My text')]'
                  <select><option>Option 1</select><...

[piotrkluz]

XPath parsing and parthenses matching RegEx will be needed in this feature:
https://regex101.com/r/eBtSTM/3