Add Tooltips for Complex Financial Terms on the Dashboard

[Fatimasanusi]

Retail users are confused by terminology like 'Slippage Tolerance', 'Limit Price', and 'Fractional Yield' on the trading dashboard. We need to add contextual helper tooltips.

Acceptance Criteria:

• Create a reusable <Tooltip /> component (using Radix UI or similar).
• Add tooltips to the order entry form explaining 'Limit', 'Market', and 'Slippage'.
• Add tooltips to the asset details page explaining 'Total Valuation' and 'Fraction Supply'.