pygmt.show_versions: Show versions of IPython and rioxarray

[seisman]

Description of proposed changes

>>> pygmt.show_versions()
PyGMT information:
  version: v0.9.1.dev13+gd2b0c39b.d20230410
System information:
  python: 3.10.9 | packaged by conda-forge | (main, Feb  2 2023, 20:20:04) [GCC 11.3.0]
  executable: /xxx/bin/python3.10
  machine: Linux-6.2.8-200.fc37.x86_64-x86_64-with-glibc2.36
Dependency information:
  numpy: 1.23.5
  pandas: 1.5.3
  xarray: 2023.2.0
  netCDF4: 1.6.3
  packaging: 23.0
  contextily: 1.3.0
  geopandas: 0.12.2
  IPython: 8.11.0
  rioxarray: 0.14.0
  ghostscript: 9.54.0
GMT library information:
  binary version: 6.4.0
  cores: 80
  grid layout: rows
  image layout: 
  library path: /xxx/lib/libgmt.so
  padding: 2
  plugin dir: /xxx/lib/gmt/plugins
  share dir: /xxx/share/gmt
  version: 6.4.0

Fixes #

Reminders

• Run make format and make check to make sure the code follows the style guide.
• Add tests for new features or tests that would have caught the bug that you're fixing.
• Add new public functions/methods/classes to doc/api/index.rst.
• Write detailed docstrings for all functions/methods.
• If wrapping a new module, open a 'Wrap new GMT module' issue and submit reasonably-sized PRs.
• If adding new functionality, add an example to docstrings or tutorials.
• Use underscores (not hyphens) in names of Python files and directories.

Slash Commands

You can write slash commands (/command) in the first line of a comment to perform
specific operations. Supported slash commands are:

• /format: automatically format and lint the code
• /test-gmt-dev: run full tests on the latest GMT development version