feat(Pagination): add new component

[layershifter]

This PR adds the fully featured pagination to SUIR using existing Menu component.

[layershifter]

@levithomason I'll be glad to hear your opinion there 😄

[codecov-io]

Codecov Report

Merging #2352 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2352      +/-   ##
==========================================
+ Coverage   99.73%   99.73%   +<.01%     
==========================================
  Files         152      154       +2     
  Lines        2664     2680      +16     
==========================================
+ Hits         2657     2673      +16     
  Misses          7        7

Impacted Files	Coverage Δ
src/addons/Pagination/Pagination.js	100% <100%> (ø)
src/addons/Pagination/PaginationItem.js	100% <100%> (ø)
src/elements/Button/ButtonGroup.js	100% <0%> (ø)	⬆️

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[levithomason]

This is so cool and much needed! Here are my initial thoughts when trying the component.

showFirstAndLast

I would expect this prop to show the first and last page number in the list of pages. However, that is already shown. This prop seems to add first and last navigation buttons but those are duplicating the first and last page number buttons:

💡 Suggestion:

Perhaps split this into showFirstAndLastNav and showFirstAndLastPage?

showPreviousAndNext

Since the item prop is prevItem I think we should use showPrevAndNext. Also, if we split the first/last nav vs page props above, then this would be showPrevAndNextNav for consistency.

Item shorthand

I can't seem to turn off the first/last page number. Passing null/false still renders them. I think we should allow turning these off.

<Pagination firstItem={null} lastItem={false} />

Oh, right. You'd pass showPreviousAndNext={false} 😊. Do we even need the show* props? The *Item props could work as <Dropdown icon={null} /> and <Modal dimmer={false} /> which removes the shorthand items. Thoughts?

[layershifter]

@levithomason I've applied proposed changes and removed all boolean show* props 👍

[levithomason]

Cool, great first implementation!

[levithomason]

Released in semantic-ui-react@0.77.2