[UX] A new look of SkyPilot console outputs

[Michaelvll]

This PR revamped the output of SkyPilot console output.

Launch

Managed Jobs

Service

TODO:

• Test logging for jobs and serve
• Use detach run by default for jobs launch for more responsive feeling as serve does (for discussion; can be done in a future PR)

Tested (run the relevant ones):

• Code formatting: bash format.sh
• Any manual or new tests for this PR (please specify below)
  • Clouds with old provisioner
• All smoke tests: pytest tests/test_smoke.py (except for test_tpu_vm_pod due to quota issue, TestStorageWithCredentials::test_aws_regions[eu-west-3] (and other 8 regions) due to permission issue).
• Relevant individual smoke tests: pytest tests/test_smoke.py::test_fill_in_the_name
• Backward compatibility tests: conda deactivate; bash -i tests/backward_compatibility_tests.sh

[Michaelvll]

Also is the space after the useful commands intended?

This new line was intended, as we have observed before that sometimes, if people ctrl-c or the program exited abnormally, users' terminal line will be shown in the same line as the last output, which looks messy. We added that newline to prevent those cases. Wdyt?