📚 Add support for importing OpenZeppelin utility libraries

[pxlvre]

🎯 Goal

Extend OpenZeppelin integration beyond tokens to include utility libraries and components.

📋 Current Limitation

Currently only supports token contracts (ERC20, ERC721, ERC1155). Need support for:

• Access control utilities
• Security libraries
• Math utilities
• Proxy patterns
• Governance components

🔧 Tasks

Core Library Updates

• Extend ContractType enum with library types
• Add LibraryType enum for different utility categories
• Update template generation for libraries

New Library Types

• Access Control: Ownable, AccessControl, Roles
• Security: ReentrancyGuard, Pausable
• Math: SafeMath, Math, SignedMath
• Utils: Strings, Arrays, Address
• Proxy: Initializable, UUPSUpgradeable
• Governance: Governor, Votes, Timelock

CLI Integration

• Add --oz-access-control flag
• Add --oz-security flag
• Add --oz-math flag
• Add --oz-utils flag
• Add --oz-proxy flag
• Add --oz-governance flag

Wotan Updates

• Library selection in interactive wizard
• Category-based library browsing
• Dependency management suggestions

Examples

gramr new contract MyContract --solidity --oz-access-control
gramr new contract SecureContract --solidity --oz-security --oz-access-control
gramr new library MathUtils --solidity --oz-math

✅ Definition of Done

• All major OpenZeppelin library categories supported
• CLI flags implemented and documented
• Wotan wizard includes library selection
• Documentation includes library examples