What you are describing would probably be best fit by what’s called a “Dyson Sphere”, which would be a spherical shell constructed around a star in order to capture and make use of all of the radiant energy of said star. Such a construct would have to have the ability to manipulate gravity in order to keep the star in the center of the sphere, and one could extend this concept to include habitable planet(s) in orbit around this star, inside the Dyson Sphere. Now, slap an Alcubierre drive on your Dyson Sphere, and you are cruising yer solar system through the galaxy.