version: add get_version_info_v2()

[yunjunz]

Description of proposed changes

• version: add get_version_info_v2() using importlib.metadata module, but it's not working yet, as described below, thus, not used yet.

  • 1st, the returned version is not correct: 1.5.1.post55, which should be 1.5.3.post2
  • 2nd, the returned date is not correct: None, which should be 2023-12-05

• version: remove the unused website and description vars

• docs/demo*: update relevant literature for San Francisco Bay dataset using GMTSAR to Xu et al. (2021, JGR)

Reminders

• Pass Pre-commit check (green)
• Pass Codacy code review (green)
• Pass Circle CI test (green)
• Pass local test
• Make sure that your code follows our style. Use the other functions/files as a basis.
• If adding new functionality, add a detailed description to the documentation and/or an example.