docs(operators): add documentation for sample & sampleTime

[hardikpthv]

Closes: #192

[codecov-io]

Codecov Report

Merging #207 into master will increase coverage by 0.04%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #207      +/-   ##
==========================================
+ Coverage   90.78%   90.82%   +0.04%     
==========================================
  Files         116      117       +1     
  Lines         445      447       +2     
  Branches        9        9              
==========================================
+ Hits          404      406       +2     
  Misses         40       40              
  Partials        1        1

Impacted Files	Coverage Δ
src/operator-docs/filtering/sample.ts	100% <ø> (ø)	:arrow_up:
src/operator-docs/filtering/index.ts	100% <100%> (ø)	:arrow_up:
src/operator-docs/filtering/sampleTime.ts	100% <100%> (ø)

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[ashwin-sureshkumar]

@hardikpthv - awesome job !!

Please make sure there is a single operator per PR. Easier to organize and track.

Also there is already a PR for sample. I will close it. Let's make sure we don't repeat work :)

[hardikpthv]

Oh i see! @ashwin-sureshkumar I will keep it in mind. :)

[ashwin-sureshkumar]

@sumitarora @btroncone - Can you please re-review this PR?

[ashwin-sureshkumar]

@btroncone @sumitarora - please re-review when get a chance

[ashwin-sureshkumar]

@btroncone @sumitarora - please re-review when get a chance

[ashwin-sureshkumar]

@btroncone @sumitarora - please re-review when get a chance

[hardikpthv]

I think sample operator can be ignored as it's already there.

[hardikpthv]

can this be merged @ashwin-sureshkumar or any changes expected?