New rules regarding namespaces used as values

The following patterns are considered not warnings:

import * as foo from "./foo";

foo.bar();
const baz = foo.baz;
const {property} = foo;

The following patterns are considered warnings:

import * as foo from "./foo";

foo();
const [value] = foo;
func(foo);
func(...foo);
const alias = foo;
const {child} = foo; // foo.child is an exported namespace

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Basically, warn if a namespace is used in a way that cannot be validated (aliased, called, destructured as array, passed as argument, etc.). There's no overlap with namespace.allowComputed in the above, but that option could be merged into this one, or these merged into another namespace option.