[WIP] Convert codebase to TypeScript.

[sundargs2000]

Just the initial draft. Most of the interfaces are copied from this PR. Tasks left would be:

1. Cross check the interfaces and add other API endpoints which aren't currently present.
2. Write unit tests - either jest/mocha?
3. Check if typescipt plugin for babel can be leveraged.
4. Configure typescipt-eslint.

As of now, I have just manually tested some endpoints. Please let me know if this and the next steps look right.

[andersk]

Changing everything at once makes this difficult to review since the diffs don’t line up at all. We should do the conversion in multiple steps: first convert CommonJS modules to ES6 modules, one at a time, then convert ES6 modules to TypeScript, one at a time. Any major formatting changes should also be separated into their own commits. The .js files generated from .ts files should not be committed to the repository.

[sundargs2000]

@andersk Thank you for the inputs. As the first step, I have converted the modules from CommonJS to ES6. Have a look.

[limpep]

+1

[Fabioni]

@sundargs2000 what is the current status of this?