SDGP-23 Add SDT Rewards on the sdFXN Gauge

Summary:

The proposal suggests adding the sdFXN gauge to the SDT gauge controller, enabling SDT incentives for sdFXN liquidity providers.

Context:

As part of our ongoing efforts to enhance participation within the Stake DAO ecosystem, we have identified an opportunity to introduce the sdFXN gauge into the SDT gauge controller.

Means:

Human resources: Minimal developer time required for integration.
Treasury resources: No additional treasury resources needed.
Technical Implementation: Add the sdFXN gauge to the SDT gauge controller.

Proposal Specifications:

Admin: veSDT holders
Community feedback: 2 days minimum
Voting Duration: 5 days