Replace whitepaper tokenomics table with infographic (#129)

## Summary
- Replaces the token allocation markdown table with the official
tokenomics infographic on the whitepaper page
- Removes the inaccurate line: "The Foundation controls 50% of total
supply, subject to linear vesting."

## Test plan
- [ ] Verify the image renders correctly on docs.yellow.org/whitepaper
- [ ] Confirm the Foundation 50% line is no longer present

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Documentation**
* Streamlined whitepaper by replacing the token allocation table with a
visual image, improving readability and reducing document length while
preserving all key information.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: ihsraham

src/pages/whitepaper.md

@@ -24,16 +24,7 @@ The total supply of YELLOW is 10,000,000,000 tokens. The issue price for the mos
 
 **Token allocation:**
 
-| Allocation | Percentage |
-|---|---|
-| Founders | 10% |
-| Token Sales | 12.5% |
-| Community Treasury | 30% |
-| Foundation Treasury | 20% |
-| Network Growth Incentives | 25% |
-| Ecosystem Accessibility Reserve | 2.5% |
-
-The Foundation controls 50% of total supply, subject to linear vesting.
+![Token Allocation](/img/token-allocation.png)
 
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