[Woo POS][Design System] Move colors from DS to the code

[kidinov]

• Create color palette [Woo POS] [Design System] Create a color palette for POS and corresponding SwiftUI colors #15063
• Replace existing POS colors
  • posPrimaryBackground [Woo POS] [Design System] Apply straightforward color updates #15068
  • posSecondaryBackground [Woo POS] [Design System] Apply straightforward color updates #15068
  • posTertiaryBackground - not used, remove [Woo POS] [Design System] Apply straightforward color updates #15068
  • posOverlayFill, posOverlayFillInverted - not used, remove [Woo POS] [Design System] Apply straightforward color updates #15068
  • posCartItemOutline [Woo POS][Design System] Update product card & image placeholder design #15089
  • posPrimaryText [Woo POS] [Design System] Apply straightforward color updates #15068
  • posPrimaryTextInverted [Woo POS] [Design System] Apply straightforward color updates #15068
  • posSecondaryText [Woo POS] [Design System] Apply straightforward color updates #15068
  • posTertiaryText [Woo POS] [Design System] Apply straightforward color updates #15068
  • posSuccessColor [Woo POS] [Design System] Apply straightforward color updates #15068
  • posPrimaryButtonBackground [Woo POS][Design System] Update buttons to use POS button style #15102
  • posSecondaryButtonForeground [Woo POS][Design System] Update buttons to use POS button style #15102
  • posTextButtonForeground [Woo POS][Design System] Update buttons to use POS button style #15102
  • posTextButtonForegroundPressed [Woo POS][Design System] Update buttons to use POS button style #15102
  • posTextButtonDisabled [Woo POS][Design System] Update buttons to use POS button style #15102
  • posBackgroundButtonDisabled [Woo POS][Design System] Update buttons to use POS button style #15102
  • posDarkGray

[dangermattic]

🚫 Please add a type label (e.g. type: enhancement) and a feature label (e.g. feature: stats) to this issue.