ipython_view: Handle more color-related ANSI escape codes

Add handling for more ANSI escape codes related to colors, see

commit 68e4f4bbec0dff3a83f11770c936635d76ce9af9
Author: Michael Weghorn <m.weghorn@posteo.de>
Date:   Sat Feb 18 17:42:48 2023 +0100

    ipython_view: Handle ANSI escape codes related to bg color

for reasoning and more details.

The newly added codes were all encountered when trying to query character extents with the GTK 4 based LibreOffice variant not yet implementing the new GTK API to provide that [1].

Without this commit in place, trying to query that in the IPython console would trigger exceptions like

In [17]: acc.queryText().getCharacterExtents(1, pyatspi.XY_WINDOW)
---------------------------------------------------------------------------
Error                                     Traceback (most recent call last)
Cell In[17], line 1
----> 1 acc.queryText().getCharacterExtents(1, pyatspi.XY_WINDOW)

File /usr/lib/python3/dist-packages/pyatspi/text.py:289, in Text.getCharacterExtents(self, offset, coordType)
    268
Traceback (most recent call last):
  File "/home/michi/temp/accerciser/share/accerciser/plugins/ipython_view.py", line 539, in _showReturned
    self._write('\n'+text)
  File "/home/michi/temp/accerciser/share/accerciser/plugins/ipython_view.py", line 471, in _write
    self.text_buffer.insert_with_tags_by_name(self.text_buffer.get_end_iter(),
  File "/usr/lib/python3/dist-packages/gi/overrides/Gtk.py", line 773, in insert_with_tags_by_name
    raise ValueError('unknown text tag: %s' % tag)
ValueError: unknown text tag: 38;5;28;01
  Cell In[18], line 2
    ---------------------------------------------------------------------------
                                                                               ^
SyntaxError: invalid syntax

With this commit in place, a more helpful error is shown now in the colorful output:

In [1]: acc.queryText().getCharacterExtents(1, pyatspi.XY_WINDOW)
---------------------------------------------------------------------------
Error                                     Traceback (most recent call last)
Cell In[1], line 1
----> 1 acc.queryText().getCharacterExtents(1, pyatspi.XY_WINDOW)

File /usr/lib/python3/dist-packages/pyatspi/text.py:289, in Text.getCharacterExtents(self, offset, coordType)
    268 def getCharacterExtents(self, offset, coordType):
    269         """
    270         Obtain a the bounding box, as x, y, width, and height, of the
    271         character or glyph at a particular character offset in this object's
   (...)
    287         down.
    288         """
--> 289         ret = Atspi.Text.get_character_extents(self.obj, offset, coordType)
    290         return rectToList(ret)

Error: atspi_error:  (1)

[1] gtk!7006 (merged)