Refactor to use single plugin slot

[MaxFrank13]

This work is to finish integrating Direct Plugins with the rest of the plugin framework. A single configuration can now handle both types of plugins that are currently offered (i.e. IFRAME_PLUGIN, DIRECT_PLUGIN)

Some of the new additions:

• PluginContainerDirect that utilizes the plugin's configuration
• Helper function added to wrap plugins
• New plugin shapes to be used in each type of plugin
• The DirectPlugins directory has been removed as it's contents were moved or no longer being used
• Tests to verify the above 🤞

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (1033187) 72.61% compared to head (b0085ad) 90.05%.
Report is 2 commits behind head on master.

❗ Current head b0085ad differs from pull request most recent head 298af7b. Consider uploading reports for the commit 298af7b to get more accurate results

Files	Patch %	Lines
src/plugins/PluginSlot.jsx	93.33%	1 Missing ⚠️
src/plugins/data/hooks.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #24       +/-   ##
===========================================
+ Coverage   72.61%   90.05%   +17.43%     
===========================================
  Files          13       12        -1     
  Lines         168      171        +3     
  Branches       30       32        +2     
===========================================
+ Hits          122      154       +32     
+ Misses         44       15       -29     
  Partials        2        2               

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