docs(resources): point supported-chains cards to specific section anchors

Improve navigation in `resources/supported-chains-and-currencies.mdx` by
updating card destinations from generic page-level links to section-level
anchors, so users land directly on the relevant content.
- updated Token List cards to point to `/resources/token-list#token-list-structure`
- updated Crosschain card to point to:
  `/api-features/crosschain-payments#crosschain-payments-supported-chains-and-currencies`
- updated Crypto-to-fiat card to point to:
  `/api-features/crypto-to-fiat-payments#crypto-to-fiat-supported-chains-and-currencies`
- updated Payment Types related card to point to:
  `/api-features/payment-types-overview#payment-types`

Author: aimensahnoun