fix: Improve security and functionality of PreParaLink contract

[kentaurse]

• Added multi-signature authorization in _authorizeUpgrade to restrict upgrades to authorized entities only, reducing unauthorized access risk.
• Removed onlyOwner restriction on transfer, transferFrom, and approve functions to enable general transferability, aligning with ERC20 standards.
• Introduced Initialized event in initialize function for improved transparency on initial token distribution.
• Applied nonReentrant modifier to transfer functions to protect against reentrancy attacks.
• Refactored deployment script to accept dynamic treasury address and validated deployment addresses for enhanced deployment flexibility and error prevention.

[hujw77]

• The owner of the PREPLK contract is now governed by the safe wallet account, decoupling the mutisig logic from this contract is better.
• The contract meets the initial requirements for the token, while future transferability enhancements will be managed through DAO governance.
• The Initialized event is redundant, as the OwnershipTransferred event already exists. Since the token total supply is hardcoded, monitoring it is unnecessary.
• While the scripting improvements are beneficial, a fixed code approach for token initialization is simpler and more conducive to auditing.