Updates the docs to better reflect Dusk’s positioning as market infrastructure for regulated digital assets.

Includes:

• Adds a market infrastructure overview page
• Adds a Dusk Connect integration page
• Adds a wallet extension page
• Adds a Dusk Trade page
• Reframes developer paths around DuskEVM and native Dusk without making either the default
• Updates core learn/developer pages with clearer institutional and tokenization language
• Adds llms.txt and llms-full.txt for AI/resource discovery