PIPE-2738: disable auto-parentheses and use tilde trick for CLI task links
Set `add_function_parentheses = False` in `docs/source/conf.py` to
prevent Sphinx from automatically appending `()` to all function and
method cross-references across the documentation.
Additionally, updated all CLI task docstrings across the pipeline
(`pipeline/h*/cli/*.py`) to use the Sphinx tilde shorthand
(`:func:~pipeline.pkg.cli.task_name`). This replaces the verbose explicit
text alias format, keeping the source code clean while ensuring the
generated links correctly resolve to their fully qualified paths and
render without parentheses.
