Add simple readme

Signed-off-by: Jakub Stejskal <[email protected]>

README.md

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+# opendatahub-crds
+
+This repository contains fluent classes for our oDH e2e test suite.
+The main goal for making the classes available through the external repository is to speed up the build of [odh-e2e test suite](https://github.com/skodjob/odh-e2e).
+
+The source CRDs are copied from [opendatahub-operator](https://github.com/opendatahub-io/opendatahub-operator) repository and are stored in our repository for [configuration files](https://github.com/skodjob/sokar/tree/main/open-data-hub/client).
+All updates are done automatically every night if a new version of ODH operator is available. 
+New versions of fluent classes are built, pushed to github storage and then a new version is set in test suite.
+
+For more information how the generator works see the [documentation](https://github.com/fabric8io/kubernetes-client/blob/main/doc/java-generation-from-CRD.md).