In order to be compatible with any CSP, we need to prevent the automatic creation of the DOM 'style' element and offer our CSS as a separate file that can be manually loaded (`Chart.js` or `Chart.min.js`). Users can now opt-out the style injection using `Chart.platform.disableCSSInjection = true` (note that the style sheet is now injected on the first chart creation).
To prevent duplicating and maintaining the same CSS code at different places, move all these rules in `platform.dom.css` and write a minimal rollup plugin to inject that style as string in `platform.dom.js`. Additionally, this plugin extract the imported style in `./dist/Chart.js` and `./dist/Chart.min.js`.
If the container size shrank during chart resize, let's assume scrollbar appeared. So we resize again with the scrollbar visible effectively making chart smaller and the scrollbar hidden again. Because we are inside `throttled`, and currently `ticking`, scroll events are ignored during this whole 2 resize process. If we assumed wrong and something else happened, we are resizing twice in a frame (potential performance issue)
These methods shouldn't have been public since they are specific to the chart controller internal logic. Note that this scale custom merging will be removed in v3.
Merge `core/core.js` in `core/core.controller.js`, split default options next to their associated code and deprecate `Chart.types` (not sure what it was for).
Samples are supposed to show good practices and in most cases we don't use the time scale but require `Chart.bundle.js`, which is not correct. Instead, we should require the non-bundled version in its minified version (`Chart.min.js`). Paradoxically, time based examples don't use `Chart.bundle.js` but require moment manually side to `Chart.min.js`, which IMO is also the correct way since it allows users to configure and use moment globally (TZ, locales, etc.) and doesn't enforce a specific moment version.
Also remove the `data-labelling.html` example because we now have an [official plugin](https://github.com/chartjs/chartjs-plugin-datalabels) that implements this feature and don't want to deal with user custom code anymore.
