Check if build system allows conversion of JavaScript to TypeScript files

[rubenthoms]

In order to allow type hints, we need to convert all JavaScript files to TypeScript files. As a prerequisite, the build system must be ensured to support TypeScript. There is a promising how2 here:
https://www.tutorialsteacher.com/typescript/converting-javascript-to-typescript

This has already been partly implemented in equinor#121. It appears the build system was already ready to take in .ts/.tsx files. However, this should be double-checked.

For the original issue see: equinor#77

NOTE: Components that do not need to be converted:

• LayeredMap (was superseded by LeafletMap)
• SubsurfaceMap (going to be removed)

[anders-kiaer]

FYI: equinor#77 (comment)