Use JSP Editor but use custom tags like <jsp: but have them recognized without tag lib declaration

I'm doing apex development in salesforce.
I love using IntelliJ but when editing some files I get lots of red 'error' marks.
I've mapped .page to JSPx files.
But there are JSP like tags <apex:output> and there are some custom component ones for our own components <c:...>
However there is no taglib declaration like in JSP, these are just known tags like <jsp:...>
Is there anyway to get he JSP editor to load/understand these custom tags?
If not is there a way to derive a custom edito from the JSP editor that I could then load the tag defs myself and this create a IntelliJ plugin

Any help is appreciated.

Thanks
Mike

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