docs(plugins) Add mini-css-extract-plugin

[EugeneHlushko]

• remove extract-text-webpack-plugin
• add mini-css-extract-plugin
• add redirect from extract-text-webpack-plugin to mini-css-extract-plugin
• fix guides asset management
• fix guides production

fixes #2016

[Jessidhia]

This won't work with hot reloading, at least not yet.

[EugeneHlushko]

Do you suggest we add a note that hot reloading wont work for now with MiniCssExtractPlugin or is there a known workaround? @Kovensky

[Jessidhia]

The known workaround is to use style-loader when hot reloading is enabled 😅

[EugeneHlushko]

Oh, so we probably can skip updating this guide for now (asset-management) and leave it with style-loader?

[jeremenichelli]

Besides this, the changes look good to me if they were properly tested.

Is it necessary to add some warning box on other plugin page to let the developer know that this one should be used?

[EugeneHlushko]

a redirect from deleted plugin is added for that, also the text of the page says why it came to replace ETWP: https://github.com/webpack-contrib/mini-css-extract-plugin

Otherwise works fine locally.

@Kovensky am i right we dont need to update asset-management guide for now?

[EugeneHlushko]

ok cleaned up asset-management.md, its good now from my perspective. Would really appreciate a re-review @jeremenichelli @Kovensky

[EugeneHlushko]

Reading through #1854 we shouldnt remove redundant plugins pages but add a deprecation warning to their pages (this means pull requests into readme.md of respective plugins repos). Should i probably remove the redirect and plugin fetch removal from this PR then? CC @montogeek

[jeremenichelli]

I just spotted the redirect @EugeneHlushko, yes, we don't delete or do that for deprecated plugins, we just add a deprecation warning similar to the one in here https://webpack.js.org/plugins/commons-chunk-plugin/

Consider teams that are not ready to upgrade and need this documentation for their use case. I think that with that change this would be good to go.

[EugeneHlushko]

@jeremenichelli done 👍

[jeremenichelli]

Thanks for addressing the comments Eugene 👍

[montogeek]

Thanks