Migrate to vite for webui

[netomi]

This PR is intended to migrate the existing frontend build system to use vite.

Changes:

• use modern jsx transform avoiding the need to import React
• use vite for building and running a dev server
• update tsconfig
• update docker build and compose configs

[netomi]

To run a dev server you can just enter yarn watch:default

Running yarn run build will build the library in /lib which is needed for publishing to npm and building open-vsx.org.

The default server can be built using yarn build:default and then executed with yarn start:default.

I did not touch the existing tsconfig as much as possible, but it could be further improved.

Vite does not use tsc for building but rather uses esbuild, so the tsconfig for building the app has an explicit noEmit: true to get warning but not emit js files as this would be useless.

[gnugomez]

LGTM overall

[gnugomez]

question (non-blocking): why did you changed this script to watch:default from dev?

Vite dev server does not generate any output, it acts as a middleware server that transforms whatever you ask for on the fly, thus it gets a bit confusing to me the wording watch since this has historically been used for tools like babel or webpack where we live transpile code and generate an output. I would argue to leave it as dev as it already is a widely adopted convention.

[netomi]

I kept the previous script as is, dev:default would probably be more appropriate.

The suffix :default is still useful imho, as you need to distinguish between the component library and the app you are building.

[netomi]

any objection to merge that PR?

That would make frontend development less painful.