[MPLUGIN-481] Provide improved plugin descriptor suitable for IDE integration

**[Konrad Windszus](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=kwin)** opened **[MPLUGIN-481](https://issues.apache.org/jira/browse/MPLUGIN-481?redirect=false)** and commented

Currently m2e is leveraging the standard plugin descriptor to extract information like description per plugin parameter (https://github.com/eclipse/lemminx-maven/blob/2c7540b79254c36f935f1d62fe218c43139595c4/lemminx-maven/src/main/java/org/eclipse/lemminx/extensions/maven/utils/MavenPluginUtils.java#L144) for exposing plugin parameter information on hover in the pom.xml editor.

The standard plugin descriptor contains parameter descriptions in plain text only format (compare with https://issues.apache.org/jira/browse/MPLUGIN-417). In order to be able to generate proper links to other plugin parameters or javadoc it is crucial to emit an enhanced version of that information.

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**Issue Links:**
- [MPLUGIN-417](https://issues.apache.org/jira/browse/MPLUGIN-417) report and descriptor goal need to evaluate Javadoc comments differently