feat: Use Twig global for `main_color` variable #533

Job	Run time
packages_split (DocGenerator, doc-generator, main)	8s
packages_split (Documents, documents, master)	8s
packages_split (DtsGenerator, dts-generator, main)	7s
packages_split (EntityGenerator, entity-generator, main)	11s
packages_split (Jwt, jwt, main)	8s
packages_split (Markdown, markdown, master)	7s
packages_split (Models, models, master)	8s
packages_split (OpenId, openid, main)	10s
packages_split (Random, random, main)	11s
packages_split (RoadizCompatBundle, compat-bundle, main)	8s
packages_split (RoadizCoreBundle, core-bundle, main)	9s
packages_split (RoadizFontBundle, font-bundle, main)	8s
packages_split (RoadizRozierBundle, rozier-bundle, main)	9s
packages_split (RoadizUserBundle, user-bundle, main)	11s
packages_split (Rozier, rozier, main)	16s
packages_split (RoadizTwoFactorBundle, two-factor-bundle, main)	8s
	2m 27s

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