chore: update package configuration and scripts

- Added clean script to remove dist directory before building
- Updated build scripts to include clean step
- Added prepublishOnly script to build library before publishing
- Added keywords and files fields in package.json
- Updated devDependencies to latest versions
- Added engines field to specify Node.js version requirement

refactor: improve TypeScript configuration

- Changed target and lib to ES2020
- Added rootDir and removed comments in output
- Updated include and exclude patterns for better clarity

feat: add tsup configuration for building

- Created tsup.config.ts for bundling with support for cjs and esm formats
- Enabled TypeScript declaration file generation and sourcemaps
- Configured external dependencies to prevent bundling of express, cors, helmet, and morgan

Author: naseif