Remote Layout Download from Robot

[Gold872]

Depends on wpilibsuite/allwpilib#7527

• Adds the ability to download and merge a layout from a robot via HTTP
• Deprecates the Shuffleboard API support as remote downloading is much more reliable and easier to maintain

Resolves #134

[codecov]

Codecov Report

Attention: Patch coverage is 46.42857% with 75 lines in your changes missing coverage. Please review.

Project coverage is 67.03%. Comparing base (eea7ba6) to head (4a5f6a5).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/pages/dashboard_page.dart	53.16%	37 Missing ⚠️
lib/widgets/tab_grid.dart	47.91%	25 Missing ⚠️
lib/services/elastic_layout_downloader.dart	0.00%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #153      +/-   ##
==========================================
- Coverage   67.35%   67.03%   -0.33%     
==========================================
  Files          78       79       +1     
  Lines        8112     8194      +82     
==========================================
+ Hits         5464     5493      +29     
- Misses       2648     2701      +53     

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[Gold872]

Gonna have to merge this right now to get it out in time for beta 5, but there are some unfinished tasks with this which will be added for the kickoff release:

1. Ability to select which file to load from instead of forcing a specific name
2. Add tab selection to elasticlib
3. Unit tests