WIP Package UI-Kit

[aljesusg]

Which problem is this PR solving?

Create a UI-KIT package #248 with a minor component

Short description of the changes

Moved TimelineRow to UI-KIT package.
I added the configuration for tests and utils/date.js for check it.

[codecov]

Codecov Report

Merging #254 into master will decrease coverage by 0.13%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #254      +/-   ##
==========================================
- Coverage    77.6%   77.47%   -0.14%     
==========================================
  Files         135      134       -1     
  Lines        2934     2925       -9     
  Branches      608      608              
==========================================
- Hits         2277     2266      -11     
- Misses        520      522       +2     
  Partials      137      137

Impacted Files	Coverage Δ
...nts/TracePage/TraceTimelineViewer/SpanDetailRow.js	100% <ø> (ø)	⬆️
...onents/TracePage/TraceTimelineViewer/SpanBarRow.js	80% <ø> (ø)	⬆️
...elineViewer/TimelineHeaderRow/TimelineHeaderRow.js	100% <ø> (ø)	⬆️
...neViewer/TimelineHeaderRow/TimelineViewingLayer.js	87.03% <0%> (-3.71%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3c6b248...f305976. Read the comment docs.