Adds chime quickstart items and basic empty mission page behind feature flag

[dakota002]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 6.21%. Comparing base (0f94655) to head (5afdd25).
Report is 25 commits behind head on main.

Files with missing lines	Patch %	Lines
...ents/NoticeTypeCheckboxes/NoticeTypeCheckboxes.tsx	0.00%	3 Missing ⚠️
app/routes/missions.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main   #2702      +/-   ##
========================================
- Coverage   6.21%   6.21%   -0.01%     
========================================
  Files        167     167              
  Lines       4231    4235       +4     
  Branches     467     468       +1     
========================================
  Hits         263     263              
- Misses      3966    3970       +4     
  Partials       2       2              

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