add changeset

Author: kadel

workspaces/marketplace/.changeset/nasty-donkeys-care.md

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+---
+'@red-hat-developer-hub/marketplace-cli': patch
+---
+
+Added new `marketplace-cli` and implement `generate` command.
+
+This command generates Plugin entities based on the information from the [dynamic-plugins.default.yaml](https://github.com/redhat-developer/rhdh/blob/main/dynamic-plugins.default.yaml) and wrapper's `package.json`. It assumes that all `packages` in the config files are wrappers.