Adaptive Card Support Enhancement: Templating And i18n

[johnmiroki]

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Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] C# and Nodejs SDK both have support from adaptive card templating, ie using variables in the adaptive card and "expanding" it with values. However, there's no such support in Java. Another related feature is i18n, for enterprise grade app, i18n is a must. However, without native support and with Templating missing, it's hard to implement i18n.

Describe the solution you'd like A clear and concise description of what you want to happen. Port Adaptive Card Templating from C#/Node to Java SDK

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered. Considering to try Thymeleaf or other templating engine as an interim solution

Additional context Add any other context or screenshots about the feature request here.