Description

If the PluginRegistry does not have the requested plugin, it should load it from the Island.

Goal/Context

Agents will request plugins from the Island at runtime. Between now and when plugins are fully implemented, we can begin to implement the infrastructure for passing them from the Island to the agent.

Tasks

• Add a method to HTTPIslandAPIClient that requests agent plugins from the API (0d) - @VakarisZ
• Use dependency injection to pass the PluginRegistry to the Puppet's constructor (0d) - @shreyamalviya
• If PluginRegistry does not have the plugin, query HTTPIslandAPIClient. Raise UnknownPluginError if the endpoint returns 404. Raise NotImplementedError if the endpoint returns a 2xx (0d) - @shreyamalviya