build: Add @deephaven/console as shared package

[mofojed]

• Allows plugins to use context of @deephaven/console
• Will be needed eventually for Code editor widget (ui.editor?) deephaven-plugins#781

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.74%. Comparing base (0a924cd) to head (cf03e99).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2205      +/-   ##
==========================================
+ Coverage   46.73%   46.74%   +0.01%     
==========================================
  Files         693      693              
  Lines       38594    38602       +8     
  Branches     9652     9775     +123     
==========================================
+ Hits        18038    18046       +8     
+ Misses      20545    20503      -42     
- Partials       11       53      +42     

Flag	Coverage Δ
unit	46.74% <ø> (+0.01%)	⬆️

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