Adding support for filteredResources in generated .project file

[ggruber4711]

Just stumbled over this wonderful fork of already retired eclipse-maven plugin. Thanks for making this work!
I have the requirement to patch the generated .project to add a filteredResources tag at the end in order to exclude the node_modules directory containing symlinks to other projects.

This manual config works for me:

	<filteredResources>
		<filter>
			<id>1552897905771</id>
			<name></name>
			<type>10</type>
			<matcher>
				<id>org.eclipse.ui.ide.multiFilter</id>
				<arguments>1.0-name-matches-false-false-node_modules</arguments>
			</matcher>
		</filter>
	</filteredResources>

However, when calling again mvn eclipse:eclipse this is discarded again. Any chance to get it down in the plugin?

[stefanseifert]

we have not so much resources for active maintenance, but if you can come up with a PR for this feature we'll definitely have a look at it.