jsr223: RuleSupport preset - add hyperlinks to the imported classes

[dilyanpalauzov]

This clarifies that automationManager is of type ScriptedAutomationManager; inserts .util before ActionBuilder, ConditionBuilder and ModuleBuilder; and puts hyperlinks to the documentation of the classes.

The last line:

| Variable          | Description                                                                       |
| ----------------- | --------------------------------------------------------------------------------- |
| ruleRegistry      | `org.openhab.core.automation.Rule`                                                |

was left as incorrect as it was. It is discussed at #2360.

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