feat: Convert DashboardPlugins to WidgetPlugins

[mattrunyon]

Fixes #1573

This fix should be adequate for furthering the Deephaven UI alpha. Rather than trying to refactor 2 1k+ line files (IrisGridPanel and ChartPanel), I opted to add some DOM detection to the Panel component to prevent rendering tab context menu/tooltips if it is nested within another panel.

For Deephaven UI, we will need to ensure the UI panel uses Panel at least and passes through glContainer and glEventHub to the child elements so grids and charts function roughly as normal.

Testing

To test how something would look/function when wrapped, remove the panelComponent line from either of the plugin configs. This will wrap in a generic WidgetPanel which you can see in dev tools. The panel tab will not have any of the custom tooltip for grid or custom context menus.

Test by opening grids/figures, applying some filters/sorts and then reloading the page to ensure the state persisted. Also test adding links and ensuring those persisted on reload. Test that a chart built with chart builder works and survives a reload as well.

Followup

We might be able to convert MarkdownPlugin and FilterPlugin, but I wanted to get the main components in first. Not sure if those would work as WidgetPlugins as currently constructed since they don't listen for PanelEvent.OPEN. FilterPlugin probably makes sense to split into a suite of plugins for each filter type which would need #1587

[codecov]

Codecov Report

Attention: 22 lines in your changes are missing coverage. Please review.

Comparison is base (54f7cc5) 46.74% compared to head (8533475) 46.69%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1598      +/-   ##
==========================================
- Coverage   46.74%   46.69%   -0.05%     
==========================================
  Files         583      583              
  Lines       36256    36264       +8     
  Branches     9072     9074       +2     
==========================================
- Hits        16947    16933      -14     
- Misses      19257    19279      +22     
  Partials       52       52              

Flag	Coverage Δ
unit	46.69% <38.88%> (-0.05%)	⬇️

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Files	Coverage Δ
...es/dashboard-core-plugins/src/ChartPluginConfig.ts	100.00% <100.00%> (ø)
...ges/dashboard-core-plugins/src/GridPluginConfig.ts	100.00% <100.00%> (ø)
...s/dashboard-core-plugins/src/PandasPluginConfig.ts	100.00% <ø> (ø)
.../dashboard-core-plugins/src/WidgetLoaderPlugin.tsx	100.00% <ø> (ø)
...s/dashboard-core-plugins/src/panels/ChartPanel.tsx	61.09% <100.00%> (+0.12%)	⬆️
.../dashboard-core-plugins/src/panels/PandasPanel.tsx	8.00% <ø> (ø)
...ckages/dashboard-core-plugins/src/panels/Panel.tsx	70.44% <100.00%> (+0.56%)	⬆️
...kages/dashboard-core-plugins/src/useHydrateGrid.ts	0.00% <ø> (-30.00%)	⬇️
...ashboard-core-plugins/src/panels/IrisGridPanel.tsx	42.44% <33.33%> (ø)
packages/dashboard-core-plugins/src/GridPlugin.tsx	25.00% <25.00%> (-75.00%)	⬇️
... and 1 more

... and 15 files with indirect coverage changes

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