Migrate KaibanJS Codebase to TypeScript

[darielnoel]

Is your feature request related to a problem? Please describe.
The KaibanJS library currently supports TypeScript, but the core codebase remains in JavaScript. Migrating to TypeScript will enhance code reliability, maintainability, and developer experience, particularly for teams that prefer or require TypeScript.

Describe the solution you'd like
Refactor the entire KaibanJS codebase from JavaScript to TypeScript, ensuring type safety and improved compatibility for TypeScript developers.

Describe alternatives you've considered
Maintaining JavaScript as the primary language with TypeScript type definitions, but full migration would provide deeper benefits, such as enhanced type checking and tooling support.

Additional context
Migrating to TypeScript aligns KaibanJS with modern JavaScript practices and meets the expectations of many developers, broadening its appeal and facilitating long-term maintenance.