Bring back colored traceback for `ConversionError`

[NiklasRosenstein]

Databind 1.x had colored tracebacks for location errors:

python-databind/databind.core/src/databind/core/mapper/location.py

Lines 71 to 113 in 33eb809

	def format(
	self,
	indent: str = ' ',
	list_item: str = '-',
	filenames: bool = True,
	sparse_filenames: bool = True,
	collapse: bool = False,
	colors: t.Optional[bool] = None,
	) -> str:
	"""
	Converts the location to a string representation of the form
	- $ (type) [filename:line:col]
	- key (type) [filename:line:col]
	...
	"""
	if colors is None and sys.stdout.isatty():
	colors = True
	c = t.cast(t.Callable, colored if colors else _no_colored)
	parts: t.List[str] = []
	prev_filename: t.Optional[str] = None
	for loc in _get_location_chain(self):
	source_changed = filenames and bool(not prev_filename or loc.filename and loc.filename != prev_filename)
	if collapse and parts and not source_changed and not loc.key:
	continue
	name = '$' if loc.key is None else f'.{loc.key}'
	parts.append(f'{indent}{list_item} {c(name, "cyan")} {c("(" + str(loc.type) + ")", "green")}')
	if not sparse_filenames or source_changed:
	parts.append(' ')
	parts.append(c(_get_filename_and_pos_string(loc.filename, loc.pos), 'magenta'))
	parts.append('\n')
	if loc.filename:
	prev_filename = loc.filename
	parts.pop() # Remove the last newline
	return ''.join(parts)

We should bring that feature back in Databind 4.x