feat: first draft for upgrades

[sogipec]

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[Copilot]

Pull Request Overview

This PR updates the Merkl protocol with significant changes to support upgrades and new operator functionality. The changes primarily involve updating author attribution from "Angle Labs, Inc." to "Merkl SAS" and implementing a comprehensive operator system for campaign and reward management.

Key changes include:

• Introduction of main operators and creator allowances for delegated campaign management
• Enhanced claim recipient functionality with governance support
• Removal of deprecated signature verification and distribution creation methods

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
contracts/partners/tokenWrappers/SonicFragment.sol	Updated author attribution to Merkl SAS
contracts/partners/tokenWrappers/PointToken.sol	Updated author attribution to Merkl SAS
contracts/mock/DistributionCreatorUpdatable.sol	Updated author attribution to Merkl SAS
contracts/interfaces/IAccessControlManager.sol	Updated author attribution to Merkl SAS
contracts/Distributor.sol	Added main operator system and enhanced claim recipient functionality
contracts/DistributionCreatorWithDistributions.sol	New contract for backward compatibility with deprecated distribution model
contracts/DistributionCreator.sol	Major refactoring with operator allowances and removal of deprecated functionality
contracts/AccessControlManager.sol	Updated author attribution to Merkl SAS
LICENSE	Updated licensor information to Merkl SAS

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