Inline sass-extract-js plugin

[sorenlouv]

Closes #1588

• Inline sass-extract-js plugin
• Remove camelCasing logic
• Preserve hex values where possible

Diff of the light theme with the new variables: https://www.diffchecker.com/ocT4Z4lA

[weltenwort]

Nice, looks like it's almost there. I left just two small comments below.

[weltenwort]

LGTM

[sorenlouv]

@chandlerprall WDYT?

[sorenlouv]

This contains breaking changes due to the removal of camelCasing. In particular the following properties will have to be replaced:

• euiSizeXs -> euiSizeXS
• euiSizeXl -> euiSizeXL
• euiSizeXxl -> euiSizeXXL
• euiFontSizeXs -> euiFontSizeXS
• euiFontSizeXl -> euiFontSizeXL
• euiFontSizeXxl -> euiFontSizeXXL

[snide]

cc @zumwalt, @daveyholler and @peteharverson. We'll clean this up once it goes into Kibana, but we're going to do a breaking change to replace thedist/eui_theme_*.json files so the variables match against the Sass layer (and documentation). Check @sqren's note above. This will only effect you if you're importing the EUI variables as JSON.

[snide]

This will need a CL. Please mark it as a breaking change. Thanks for doing this. One less regret from the past destroyed from my conscious :)

Here is a diff (stored for one month) in case anyone needs a reference of what this changes in the dist. I did a build and looked through the diff to make sure it matched what we'd expect.

https://www.diffchecker.com/ArT67fzc

[snide]

Also cc @timroes @markov00 since they might be importing these into visualizations and will need to be aware of the change.

[timroes]

It seems this is used in two files x-pack/plugins/beats_management/public/components/autocomplete_field/suggestion_item.tsx and x-pack/plugins/infra/public/components/autocomplete_field/suggestion_item.tsxso whoever updates Kibana to that EUI version should remember to update those two files to the new format.

[sorenlouv]

Oh, was a bit too quick and missed the changelog item. Adding it via this PR. Sorry. #1594