feat: add support for defining card messages with XML (#9) #166

Job	Run time
Build and Test (windows-latest) / Build and Test	2m 34s
Build and Test (macOS-latest) / Build and Test	2m 45s
Build and Test (ubuntu-latest) / Build and Test	1m 14s
Push Packages / Push Packages	1m 5s
	7m 38s

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