Update typescript, hot-reloading

[Kyle-Verhoog]

react-hot-loader is no longer recommended. Instead "react fast refresh"
is suggested.

• replace babel with ts-loader

links:

• https://github.com/TypeStrong/ts-loader#getting-started
• https://github.com/pmmmwh/react-refresh-webpack-plugin/#usage
• https://github.com/TypeStrong/ts-loader/blob/416fa24/examples/fork-ts-checker-webpack-plugin/webpack.config.development.js

[Kyle-Verhoog]

It does seem like the hot reloading is not as nice. Namely, it appears as though reloads basically reset the page rather than the individual components like the current hot reloading does.