Decouple Source dev kitchen components from ArticleFormat

[jamesmockett]

The following Source Development Kitchen components include a format prop that relies on the ArticleFormat type from @guardian/libs:

QuoteIcon
ToggleSwitch
EditorialButton

Source components should not be dependent on ArticleFormat as this ties them to DCR whereas they should be reusable anywhere. Additionally, we want to relocate the ArticleFormat types from @guardian/libs to DCR, but this can't be done whilst there are components that rely on them.

format is used by all of these components to apply an appropriate colour scheme based on the selected Pillar. They should be refactored so that a colour scheme or theme can be applied in a more generic way that doesn't rely upon ArticleFormat.

QuoteIcon

Doesn't appear to be used anywhere. DCR has it's own local copy so we can probably safely remove the format prop entirely.

ToggleSwitch

Used by DCR, manage-frontend and support-frontend, but none of these appear to use format. ArticleFormat isn't used in any meaningful way—the presence of format simply toggles between two alternate colour schemes.

EditorialButton

Used by DCR in single place. format is used to theme the button using the selected Pillar.

[SiAdcock]

• Remove QuoteIcon from @guardian/source-development-kitchen: Remove QuoteIcon csnx#1730
• Remove EditorialButton and EditorialLinkButton from @guardian/source-development-kitchen: Remove EditorialButton and EditorialLinkButton components csnx#1731
• Remove format prop from Toggle Switch: Remove the unused format prop from ToggleSwitch csnx#1732
• Inline EditorialButton and EditorialLinkButton into DCR: Inline EditorialButton and EditorialLinkButton into DCR #12520
• Release @guardian/[email protected]: 🦋 Release package updates csnx#1734
• Update new references to @guardian/libs introduced by inlining EditorialButton: Inline EditorialButton and EditorialLinkButton into DCR #12520 (comment)
• Integrate EditorialButton styles into DCAR palette: Palettify editorial button colours #12536
• Update link to local version of format in EditorialButton types: Inline EditorialButton and EditorialLinkButton into DCR #12520 (comment)