feat(react-styled): add ConsoleLayout component + full-app-styled example shell

[alikhere]

Overview

The @storacha/console-toolkit-react-styled package currently only provides authentication components. User (parnter app) building full applications have no pre-styled layout shell to work with, requiring them to implement their own sidebar and navigation from scratch.

What needs to be done

Add a ConsoleLayout styled component that replicates the official Storacha console sidebar layout, so partners can drop it
into their app and get the correct UI with zero CSS work.

Requirements

• yellow sidebar matching the official console (#FFC83F background, #E91315 borders)
• Compact space selector in the sidebar for switching between spaces
• Footer links (Terms, Docs, Support, Log Out) pinned to the bottom of the sidebar
• Main content area with the racha-fire-opacity-50.png fire background
• Responsive — sidebar collapses on mobile with a hamburger menu and overlay
• racha-fire.png and racha-fire-opacity-50.png assets bundled into the package
• Space type re-exported from the styled package so partners never need to import from @storacha/ui-core directly
• A minimal examples/full-app-styled app demonstrating auth → layout → space list, with all imports from
  @storacha/console-toolkit-react-styled only and zero partner-written CSS

Acceptance Criteria

• Sidebar visually matches the official Storacha console
• Mobile responsive with hamburger and overlay
• All styles ship from @storacha/console-toolkit-react-styled/styles.css — no CSS required from the partner
• pnpm run ci passes