Introducing QgirdNext: bug fixes and compatibility improvements

[zhihanyue]

Since Qgrid has ceased maintenance, I've created a new repo QgridNext to continue maintaining it for future Jupyter versions.

QgridNext is now compatible with recent releases of Jupyter:

QgridNext	JupyterLab	Notebook	Voila
v2.0.0	v3 - v4	v5 - v7	v0.2 - v0.5

Now it works as a prebuilt extension (introduced in JupyterLab 3), hence JupyterLab 1/2 are no longer supported.

What's changed:

• Support JupyterLab 4;
• Released as a prebuilt extension (now can be installed with one step);
• UI improvements:
  • Fix infinitely expanding width of the container in voila <= 0.3;
  • Prevent unexpected scrolling when clicking rows in Chrome for JupyterLab;
  • Adapt canvas size when the sidebar width changes in JupyterLab;
  • Fix poorly displayed left/right button of date picker;
  • Correct text color in dark mode;
  • Standardize HTML tags to fix poorly displayed filters;
• Building bug fixes:
  • Fix inconsistent pkg name for embeddable qgrid bundle;
  • Fix data_files finding that results in incomplete extension setup;
  • Fix building errors for Node >= 18;
• Other fixes:
  • Ensure Defaults.grid_option dict instance are not shared across widget instances;
  • Remove full-screen mode for voila compatibility;
  • Remove deprecated QGridWidget alias, only QgridWidget is allowed;
  • Replace deprecated usages for traitlets, pandas and jquery.

I've reorganized documents, readme, test environments and demos for a fresh start for the new repo. Your feedback, issues and PRs are welcomed and highly appreciated. If there's any good PRs from the community, I'll gladly review and merge them. If you find this repo helpful, please consider giving it a star.

[Vslira]

Great work!