Add bruteforce sampler

[hrntsm]

Reference Issues/PRs

What does this implement/fix? Explain your changes.

Add bruteforce sampler

[codecov]

Codecov Report

Attention: Patch coverage is 9.09091% with 10 lines in your changes missing coverage. Please review.

Project coverage is 45.77%. Comparing base (b32249b) to head (36bdc66).
Report is 2 commits behind head on develop.

❗ Current head 36bdc66 differs from pull request most recent head 65014a9

Please upload reports for the commit 65014a9 to get more accurate results.

Files	Patch %	Lines
Optuna/Sampler/BruteForceSampler.cs	0.00%	5 Missing ⚠️
Optuna/Study/Study.cs	0.00%	3 Missing ⚠️
Tunny.Core/Settings/Sampler.cs	33.33%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #299      +/-   ##
===========================================
- Coverage    46.16%   45.77%   -0.40%     
===========================================
  Files           39       40       +1     
  Lines         2190     2211      +21     
  Branches       181      186       +5     
===========================================
+ Hits          1011     1012       +1     
- Misses        1150     1170      +20     
  Partials        29       29              

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

[codeclimate]

Code Climate has analyzed commit 65014a9 and detected 3 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Complexity	1
Duplication	2

View more on Code Climate.