I want to be able to rename a file based on an import or export specifier:

import "./foo";

import * as foo from "./foo.ts";

export * from './bar';

In other words, F2 in VS Code on "./foo", "./foo.ts, and './bar' should allow me to rename the file if it originates from the appropriate workspace. Ideally this doesn't mess with .d.ts files that aren't considered hand-authored, but that's tough to differentiate.

My expectations:

• we should maintain the extension for the new file if unspecified in the import/export specifier (i.e. keep it as .js, .jsx, .ts, .tsx if not mentioned in the resulting string)
• we should change the extension if explicitly specified in the new specifier
• for affected import/export specifiers, we should maintain whether or not an extension was ever specified.