Feature/design update

[fraincs]

Reworked the UI / added a functional Sidebar and Aside for token pages / routing for token pages / added empty mdx for all possible token documentation pages

• Sidebar component is now context aware.
• CSS changes to better match the UI.
• MDX files for tokens section have been created as placeholders.
• Routing has been done for the token section.
• Replaced tokens for the new ones better matching the Hopper brand.
• Added the Workleap logo in the Header.
• Added an Aside component to the Token layout.
• Added a new document type in Contentlayer for Tokens and Components.
• Removed date metadata in mdx as we don't need those.

[changeset-bot]

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Latest commit: 4c9d3c3

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