feat(Calendar): add click-subtitle event

[chenjiahan]

#8978

[codecov-commenter]

Codecov Report

Merging #8981 (444ccb8) into dev (779f336) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##              dev    #8981   +/-   ##
=======================================
  Coverage   89.90%   89.91%           
=======================================
  Files         221      221           
  Lines        5500     5503    +3     
  Branches     1361     1361           
=======================================
+ Hits         4945     4948    +3     
  Misses        322      322           
  Partials      233      233           

Impacted Files	Coverage Δ
src/calendar/Calendar.tsx	94.81% <100.00%> (+0.02%)	⬆️
src/calendar/CalendarHeader.tsx	100.00% <100.00%> (ø)

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