Registration Proxy with Unicode Filter and List Management

[bestsilly]

This integration ensures centralized control and management under the JNSAdminContract. #3

Mapping Implementation:

• Use Solidity mappings to store whitelisted and blacklisted Unicode characters.
• Ensure characters are stored using their Unicode code points as keys. (key: byte32, value: boolean)

Character Validation Logic:

• Develop logic to validate each character in a requested JNS name against the whitelist and blacklist mappings.

List Management Functions:

• Create functions to add and remove characters from the whitelist and blacklist.
• Implement access control to restrict list management functions to authorized users.
• Implement a getWhitelist function