* First prototype of PB.
* Repurpose UnderlineBar.
* Factor out 'Bar' widget.
* Revert "Factor out 'Bar' widget."
This reverts commit 0bb4871adf566416cfe590ac4396e0b79f84165c.
* Add Bar widget.
* Cap progress at 100%.
* Add skeleton for the ETA label.
[skip ci]
* Add ETA display.
* Improve docstrings.
* Directly compute percentage.
* Watch percentage changes directly.
[skip ci]
* Documentation.
* Make reactive percentage private.
Instead, we create a public read-only percentage property.
* Update griffe to fix documentation issue.
Related issues: #1572, https://github.com/mkdocstrings/griffe/issues/128.
Related PRs: https://github.com/mkdocstrings/griffe/pull/135.
* Add example and docs.
* Address review feedback.
[skip ci]
* More documentation.
* Add tests.
* Changelog.
* More tests.
* Fix/fake tests.
* Final tweaks.
