Add new `JSONMatch()` descriptor to Evidently

[elenasamuylova]

Add a new JSONMatch() descriptor

About Hacktoberfest contributions: https://github.com/evidentlyai/evidently/wiki/Hacktoberfest-2024

Description:

The JSONMatch() descriptor compares a JSON object in a given column against a reference JSON object in the specified reference column and returns True or False based on whether the JSONs are identical.

JSON Matching Criteria:

• Both JSON objects must have the exact same set of keys.
• The values associated with each key must be identical.
• The order of keys does not matter.
• Whitespace outside of the actual values (e.g., spaces, tabs, or newlines) is ignored.
• If either of the inputs is an invalid JSON, they will not match, and the descriptor will return False.

Reference: For a two-column descriptor implementation, use the CustomPairColumnEval template and check the SemanticSimilarity descriptor as an example (implement the with_column parameter the same way).