Typescript migration

It is better to move to typescript in early stages only.

Before that we should define the important area of the app - from scope perspective. Need work on design items.

We can also enable lint and type checking tools in the github actions to keep the code clean and error free.

For start we can keep those checks lenient, later we can make them strict.

The issue discusses migrating the project to TypeScript, enabling linting and type checking in GitHub Actions, and defining important app areas from a scope perspective. First, examine the existing JavaScript codebase structure to understand the modules. Look for any existing configuration files like package.json or GitHub Actions workflows. 'Done' would mean a TypeScript configuration is set up, core files are converted, and CI checks are running.

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