I need a clean, well-commented Solana Program written in Rust with Anchor that lets me create and manage a new token from scratch. The core requirement is straightforward token generation, but all critical actions—minting additional supply later, burning, updating metadata, pausing transfers—must be limited to an on-chain Administrator role defined in the program. Please structure the code so it compiles and deploys in Solana Playground with a single `anchor build && anchor deploy`, and include a short test or demo script showing the admin wallet exercising its exclusive privileges. A concise README that walks through setup, deployment, and typical admin calls will be the final piece I need to ship this into production.