[dysnix/app] add multi-component mode

[dennybaa]

Hello @voron, I've dropped this update hope you could have a look when possible. Not urgent.

Shortly these improvements are introduced after trying and testing the chart in the library mode. For example, in a child chart say it in the deployment.yaml we just paste the bellow to include the resource:

{{/* Includes this resource */}}
{{- include "app.template" . -}}

Of course file name should follow the naming convention (name matches the resource template), but anyway this can be parameterised. This is shortly it, but apart from this the core library template (app.resource.include) is refined and looks better now.