* feat: use NumpyDoc to represent Parsed docstring
in cli_utils.py
* feat: set argparse boolean option from default values
* refactor: shorter Arg in annotation
by following convention in cli_utils.py
* fix: get description without Parameters
* fix: qa errors
* feat: add colored help formatter and alias builder
closes#4284
* feat: add auto-completion support to argparser
* test: update test for completer
* fix: getting doc from params that have annotation
* refactor: use filter-function for checking alias completions
* doc: add discussion abount check for alias having parser
see discussion on
https://github.com/xonsh/xonsh/pull/4267
* type fix
* refactor: use function based completer
* test: fix failing argparser test
* docs: update news item
* update completion for argparser sub-commands to append_space
from comment on
https://github.com/xonsh/xonsh/pull/4267#discussion_r676044508
* docs: update docstring typo
* refactor: move inspect import to top
* feat: support option strings before positionals
and add env setting for showing completions for options by default
* test: update tests after adding new $ALIAS_COMPLETIONS_OPTIONS_BY_DEFAULT
* add suggested completion_context_parse fixture
* docs: add suggested doc for dispatch function
* refactor: use try/except for import of typing.annotated
* refactor: move complete_argparser_aliases to completers/aliases.py
* refactor: move argparser completer to its own module
* style:
* refactor: rename completer to not clash with argparse
* fix: expand option's descriptions
* fix: add completer/argparser to amalgam
