feat: added tonco dex to types and new property added to SelectedPool Object

[Ho3einWave]

This pull request includes changes to the src/types/router.ts file to add a new DEX option and to include more detailed information about DEXes.

The most important changes include:

Enhancements to DEX options:

• Added a new DEX option tonco to the Dex type.

Addition of detailed DEX information:

• Added a new DexDetails interface with name and icon_url properties.
• Updated the SelectedPool interface to include a dex_details property of type DexDetails.