Make .marko-run/routes.d.ts diff-able

Some lines of the generated .marko-run/routes.d.ts can be very long. This makes it wrap on small columns, and especially difficult to diff by a human.

Eg:

declare module "../src/routes/+layout.marko" {
  export interface Input extends Run.LayoutInput<typeof import("../src/routes/+layout.marko")> {}
  namespace MarkoRun {
    export { NotHandled, NotMatched, GetPaths, PostPaths, GetablePath, GetableHref, PostablePath, PostableHref, Platform };
    export type Route = Run.Routes["/aaaaa" | "/bbbbb" | "/ccccc" | "/ddddd" | "/eeeee" | "/fffff"];
    export type Context = Run.MultiRouteContext<Route> & Marko.Global;
    export type Handler = Run.HandlerLike<Route>;
    /** @deprecated use `((context, next) => { ... }) satisfies MarkoRun.Handler` instead */
    export const route: Run.HandlerTypeFn<Route>;
  }
}

Could perhaps be written as:

declare module "../src/routes/+layout.marko" {
  export interface Input
    extends Run.LayoutInput<typeof import("../src/routes/+layout.marko")> {}
  namespace MarkoRun {
    export {
      NotHandled,
      NotMatched,
      GetPaths,
      PostPaths,
      GetablePath,
      GetableHref,
      PostablePath,
      PostableHref,
      Platform,
    };
    export type Route = Run.Routes[
      | "/aaaaa"
      | "/bbbbb"
      | "/ccccc"
      | "/ddddd"
      | "/eeeee"
      | "/fffff"
    ];
    export type Context = Run.MultiRouteContext<Route> & Marko.Global;
    export type Handler = Run.HandlerLike<Route>;
    /** @deprecated use `((context, next) => { ... }) satisfies MarkoRun.Handler` instead */
    export const route: Run.HandlerTypeFn<Route>;
  }
}

Start by locating the generator that produces .marko-run/routes.d.ts and inspect how route declarations, exported names, and union types are formatted. Compare its output with the diff-friendly example in the issue; done means generated declarations wrap long lines and remain valid TypeScript.