[Rewrite] Implement Matchmaking Rewrite

[AToska21]

Resolves #9

Changes:

Implements the nex-protocols-common-go matchmaking rewrite.

• I have read and agreed to the Code of Conduct.
• I have read and complied with the contributing guidelines.
• What I'm implementing was an approved issue.
• I have tested all of my changes.

[AToska21]

NOTE: For this PR to function with the rewrite, some changes need to be applied to it.

1. In matchmake-extension/database/find_matchmake_session_by_search_criteria.go, line 77, right after the for loop but before the if statement, add if i == 1 { continue; }.
2. Replace all instances of ms.max_participants and ms.min_participants with g.max_participants and g.min_participants.

[AToska21]

Reverted to draft due to Splatfest issues.