WIP Make jaeger-ui installable

[aljesusg]

Which problem is this PR solving?

Issue #248 Make jaeger-ui installable

Short description of the changes

Change package.json to be public, add babel-preset-react-app to compile components

[codecov]

Codecov Report

Merging #249 into master will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #249      +/-   ##
==========================================
- Coverage   78.61%   78.57%   -0.04%     
==========================================
  Files         135      135              
  Lines        2927     2927              
  Branches      607      607              
==========================================
- Hits         2301     2300       -1     
- Misses        495      496       +1     
  Partials      131      131

Impacted Files	Coverage Δ
...neViewer/TimelineHeaderRow/TimelineViewingLayer.js	88.88% <0%> (-1.86%)	⬇️

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[tiffon]

I have reservations about wholesale publishing the UI as a component library. I added a comment to #248:

One drawback for wholesale publishing the React components, in their current form, is that when all of the components become public, their combined API becomes the API contract. That's a massive contract. So much so it would essentially become impossible to maintain backwards compatibility while making any significant changes to the UI.

So, if we go down the path of publishing React components, I think the approach outlined by @saminzadeh would make the API contract more manageable.

I'm not sure publishing the current site is the most manageable approach, in the long-term. Let's discuss in #248?

[aljesusg]

I agree @tiffon, this was only a WIP and test about how to handle this, we shoukd discuss if create another package called ui-kit like saminzadeh proposed and create/move there the components or transform this one so this has no sense. I'll close this. Thanks