feat: added create endpoint for dynamic_routing (#8755)
Co-authored-by: Ankit Gupta <ankit.gupta.001@Ankit-Gupta-M6QG9L6RHV.local>
Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitch-bot[bot]@users.noreply.github.com>
Co-authored-by: Jagan <jaganelavarasan@gmail.com>
