Feature/add design explorer submodule

[hrntsm]

Reference Issues/PRs

What does this implement/fix? Explain your changes.

add design explorer submodule

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.

Project coverage is 42.70%. Comparing base (c7fe2e5) to head (9304ed9).
Report is 1 commits behind head on develop.

Files	Patch %	Lines
Tunny.Core/Handler/DesignExplorer.cs	0.00%	16 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #301      +/-   ##
===========================================
- Coverage    42.99%   42.70%   -0.29%     
===========================================
  Files           41       41              
  Lines         2370     2386      +16     
  Branches       195      197       +2     
===========================================
  Hits          1019     1019              
- Misses        1320     1336      +16     
  Partials        31       31              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[codeclimate]

Code Climate has analyzed commit 9304ed9 and detected 0 issues on this pull request.

View more on Code Climate.