I think that would be more trouble than it's worth. Since "any" is a keyword, you wouldn't even need regex to search for it. Something like this would work:

" = any"

This would only show types that are aliases of the "any" type. As a side note, the following would create a compiler error ("cannot find name 'any'") because types are metadata and can't be used as program data.

const something = any;

Heh, sure does bring memories of the C64 BASIC where string-typed variables and functions were marked with a $ suffix :)