feat(FSADT1-1364): backend fuzzy match for contacts

[paulushcgcj]

Description

When a contact is added to the staff screen, a fuzzy match should be triggered to check if the contact already exists in the system. The fuzzy match for contact should be grouped into distinct groups, that will be then checked against the existing entries. In case of a match, the fuzzy match should return the data pointing out to what entry it matches, so it can be shown for each contact entry. One match block should be the combination of first name, last name, email and any phone number, the second one should be each phone number and the last one should be the email address.

Type of change

• [x] New feature (non-breaking change which adds functionality)
• [x] This change requires a documentation update

How Has This Been Tested?

• [x] New unit tests
• [x] New integrated tests
• [x] Updated existing tests

Checklist

• [x] I have read the CONTRIBUTING doc
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have already been accepted and merged

Further comments

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Current changelog

Features

• FSADT1-1364: added contact match on backend (46af27d)
• FSADT1-1364: added contact search for staff (a464dcc)

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Overall Project	NaN% NaN%	:green_apple:

There is no coverage information present for the Files changed