[routing-utils] MAJOR refactor getTransformedRoutes and types (#8155)

This is a semver major change to the public API for `@vercel/routing-utils` which includes the following breaking changes.

1. `getTransformedRoutes({ nowConfig })` props changed to `getTransformedRoutes(nowConfig)`
2. `type Source` renamed `type RouteWithSrc`
3. `type Handler` renamed `type RouteWithHandle`
4. `interface VercelConfig` removed
5. `type NowConfig` removed
6. `type NowRewrite` removed
7. `type NowRedirect` removed
8. `type NowHeader` removed
9. `type NowHeaderKeyValue` removed

packages/cli/src/util/dev/server.ts

@@ -558,9 +558,8 @@ export default class DevServer {
     ]);
 
     await this.validateVercelConfig(vercelConfig);
-    const { error: routeError, routes: maybeRoutes } = getTransformedRoutes({
-      nowConfig: vercelConfig,
-    });
+    const { error: routeError, routes: maybeRoutes } =
+      getTransformedRoutes(vercelConfig);
     if (routeError) {
       this.output.prettyError(routeError);
       await this.exit();