doltsrht: pass full os.Args to server.New so -b binds the web listener

getopt skips argv[0] as the program name, so os.Args[1:] made it swallow the
first real flag (-b) and silently fall back to defaultWebAddr (localhost),
leaving the web UI unreachable from Traefik. Match compare/upstream: pass os.Args.

rename module to sourcecraft.dev/bigbes/sr-ht-dolt; depend on sourcecraft sr-ht-core

cmd: doltsrht and doltsrht-migrate binaries, module tidy