Extract React Application as a Feature (#7441)

* Fix webpack config for react

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

* Introduce package for discovering html elements in unit tests

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

* Switch to using discovery of html elements from package

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

* Introduce competition for starting react application inside the Feature

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

* Move stuff in application start to earlier timeslot having no real need to be done so late

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

* Switch to using react application root feature being more friendly to extending

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

* Switch to using more familiar pattern of higher order components for wrapping react application

Co-authored-by: Mikko Aspiala <mikko.aspiala@gmail.com>

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

* Adapt to more familiar pattern for higher order components

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

* Rename feature for clarity

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

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Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

packages/technical-features/react-application/.prettierrc

@@ -0,0 +1 @@
+"@k8slens/eslint-config/prettier"