feat: Widget plugins

[mattrunyon]

Fixes #1455
Fixes #1167 by allowing widget plugins to advertise their supported types. Dashboard plugins don't make as much sense supporting specific types and all of our existing dashboard plugins that open widgets from the server could be converted to widget plugins.

I debated making supportedTypes have a type of string | { type: string, icon: Icon } (+ array version), but felt it complicated things unnecessarily for our current types/icons. We can always add it in the future, but for now each widget plugin could support multiple types, but have 1 icon for the console.

I converted the pandas plugin as a test of widget plugins. Confirmed that if I create a dataframe and apply a sort/filter those persist across page refreshes.

Example code to make a dataframe

from deephaven import empty_table
from deephaven.pandas import to_pandas
t = empty_table(40000).update(["Timestamp=epochMillisToInstant(i)","x=(double)i", "y=i%12==11?null:Math.sin(i)"])
df = to_pandas(t)

Still needed

• Wrapping in panel component
• Config option to not automatically wrap

[mofojed]

I wonder if we should deprecate the PanelEvent.OPEN, and change it to like WidgetEvent.OPEN or something. Since one widget can open multiple panels (defined with ui.panel). Re-hydrating the children panels will be interested as well.

[codecov]

Codecov Report

Attention: 26 lines in your changes are missing coverage. Please review.

Comparison is base (876a6ac) 46.44% compared to head (74a62ae) 46.65%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1564      +/-   ##
==========================================
+ Coverage   46.44%   46.65%   +0.20%     
==========================================
  Files         572      575       +3     
  Lines       36082    36189     +107     
  Branches     9035     9063      +28     
==========================================
+ Hits        16759    16883     +124     
+ Misses      19271    19254      -17     
  Partials       52       52              

Flag	Coverage Δ
unit	46.65% <81.29%> (+0.20%)	⬆️

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Files	Coverage Δ
packages/app-utils/src/components/AppBootstrap.tsx	87.50% <ø> (ø)
...ages/app-utils/src/components/PluginsBootstrap.tsx	94.11% <ø> (ø)
packages/code-studio/src/index.tsx	0.00% <ø> (ø)
...ges/console/src/console-history/ConsoleHistory.tsx	100.00% <100.00%> (ø)
...console/src/console-history/ConsoleHistoryItem.tsx	52.72% <100.00%> (ø)
...s/dashboard-core-plugins/src/PandasPluginConfig.ts	100.00% <100.00%> (ø)
.../dashboard-core-plugins/src/WidgetLoaderPlugin.tsx	100.00% <100.00%> (ø)
...board-core-plugins/src/WidgetLoaderPluginConfig.ts	100.00% <100.00%> (ø)
...ckages/dashboard-core-plugins/src/panels/Panel.tsx	69.87% <100.00%> (+11.31%)	⬆️
.../dashboard-core-plugins/src/panels/WidgetPanel.tsx	54.23% <ø> (+3.38%)	⬆️
... and 9 more

... and 1 file with indirect coverage changes

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