Add content for building a design system

content/roadmaps/111-design-system/content/102-making-a-design-system/100-from-scratch.md

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-# From scratch
+# From Scratch
+
+If you are building a Design System from Scratch, you may skip the "Existing Design Analysis" node of the roadmap and start with "Creating Design Language".
+
+<BadgeLink colorScheme='blue' badgeText='Watch' href='https://www.youtube.com/watch?v=RYDiDpW2VkM'>Create a Design System with Figma - Full Course</BadgeLink>
+

content/roadmaps/111-design-system/content/102-making-a-design-system/101-from-existing-design.md

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-# From existing design
+# From Existing Design
+
+If you are creating a Design System from pre-existing product design, there is an additional step to perform the existing design analysis, understand the existing design process, perform a visual audit, identify design elements and components and so on.