Build open-scd official plugins as standalone builds for each plugin

[david-monichi]

[david-monichi]

After checking with @trusz we will analyse the reason why the plugins are not loadable dynamically and try to estimate the effort to bring the step further. We will provide an udpate as soon as we have new information

[michelguerin]

Plugin will be hosted ob github pages afterwards.

[david-monichi]

see ticket -> #1