feat: implement ELO-based filters for match creation

[Luchistack]

#closes #946
Title: feat: implement conditional match creation with ELO-based filters

Description:
This PR updates the Match struct and adds validation logic to support ELO-based filtering for match creation. This ensures that players can only participate in matches that align with their skill level, improving the competitive integrity of the platform.

Key Changes:

Data Structure: Added min_elo and max_elo fields to the Match struct in contracts/escrow/src/lib.rs.

Logic: Implemented range validation in create_filtered_match to prevent invalid configurations.

Security: Added an ELO range check in the deposit flow to ensure participants meet the match requirements.

Testing:

[x] Verified min_elo vs max_elo constraint logic.

[x] Ensured deposit transaction rejects players outside the specified skill tier.

#closes