text: Title: Feature: add `xontext` to builtin aliases
  Body: I found that [`xc` from xontrib-rc-awesome](https://github.com/anki-code/xontrib-rc-awesome/blob/c0a0e159a14a8560e17b70cd8ac23c451274fde0/xontrib/rc_awesome.xsh#L98-L115) is very useful alias:
  
  ```xsh
  from shutil import which as _which
  
  # Alias to get Xonsh Context.
  # Read more: https://github.com/anki-code/xonsh-cheatsheet/blob/main/README.md#install-xonsh-with-package-and-environment-management-system
  @aliases.register("xc")
  def _alias_xc():
      """Get xonsh context."""    
      print('xpython:', imp.sys.executable, '#', $(@(imp.sys.executable) -V).strip())
      print('xpip:', $(which xpip).strip())  # xpip - xonsh's builtin to install packages in current session xonsh environment.
      print('')
      print('xonsh:', $(which xonsh))
      print('python:', $(which python), '#', $(python -V).strip())
      print('pip:', $(which pip))
      if _which('pytest'):
          print('pytest:', $(which pytest))
      print('')
      envs = ['CONDA_DEFAULT_ENV']
      for ev in envs:
          if (val := __xonsh__.env.get(ev)):
              print(f'{ev}:', val)
  ```
  It will be grate to have `xontext` alias:
  ```xsh
  xontext
  # [Current xonsh session]
  # xpython: /Users/pc/.local/xonsh-env/bin/python # Python 3.12.2
  # xpip: /Users/pc/.local/xonsh-env/bin/python -m pip
  #
  # [Current commands environment]
  # xonsh: /Users/pc/.local/xonsh-env/xbin/xonsh  # https://github.com/anki-code/xonsh-install
  # python: /opt/homebrew/bin/python # Python 3.11.6
  # pip: /opt/homebrew/bin/pip
  ```
  
  ## For community
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