chore: Add tab-react-router example

[diegohaz]

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[codecov]

Codecov Report

Merging #956 (ee4efc0) into v2 (6eb6088) will increase coverage by 0.36%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##               v2     #956      +/-   ##
==========================================
+ Coverage   41.96%   42.33%   +0.36%     
==========================================
  Files         152      154       +2     
  Lines        4084     4110      +26     
  Branches     1156     1160       +4     
==========================================
+ Hits         1714     1740      +26     
  Misses       2369     2369              
  Partials        1        1              

Impacted Files	Coverage Δ
...it/src/tab/__examples__/tab-react-router/index.tsx	100.00% <100.00%> (ø)
...src/tab/__examples__/tab-react-router/tab-link.tsx	100.00% <100.00%> (ø)

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