Dash-picture-annotation

:wrench: Fix

1. Fix: The docstring/notation of the property `init_scale` is not correct. Now, add the missing notations.

:mega: New

1. Improve and add the scaling control features. Now, the annotated image scale behaves more like the `<img>` tag. Users can use a new property, `init_scale`, to fine-grain control the scale.
2. Add utilities and typehints related to the newly introduced `scale` features. It is recommended that `dpa.sanitize_scale` can be used to create `dpa.Scale`.
3. Add demo of the new feature `init_scale` to `usage.py`.

:floppy_disk: Change

1. Bump the `yarn` version from `4.5.3` to `4.7.0`.
2. Add the dependency `react-image-size`.

:wrench: Fix

1. Fix: Correct typos in the docstrings.
2. Fix: Add `examples/*` to the include list of `MANIFEST.in`.
3. Fix: The `examples/*` should be included in the Dockerfile. The configurations related to it has been corrected.

:floppy_disk: Change

1. Bump the `yarn` version from `4.5.1` to `4.5.3`.

:floppy_disk: Change

1. Add the missing document information to the package metadata.

:mega: New

1. Create this project.
2. Finish the react implement `src` and the automatically generated package `dash_picture_annotation`.
3. Add the React demo `App.js`.
4. Add the Dash demo `usage.py` and more examples in `./examples`.
5. Add the unit tests in `./tests`.
6. Add configurations `pyproject.toml`.
7. Add the devloper's environment folder `./docker` and the `Dockerfile`.
8. Add GitHub workflows and issue/PR templates.
9. Add the banner in the readme file.

:wrench: Fix

1. Fix: Fix the video link in the readme file.