feat(agent-nft): set NFT collection metadata

Author: alsakhaev

contracts/agent-nft/src/lib.rs

@@ -70,8 +70,8 @@ impl Contract {
             owner_id,
             NFTContractMetadata {
                 spec: NFT_METADATA_SPEC.to_string(),
-                name: "Example NEAR non-fungible token".to_string(),
-                symbol: "EXAMPLE".to_string(),
+                name: "NEAR.AI Agent Collection".to_string(),
+                symbol: "NEARAI".to_string(),
                 icon: Some(DATA_IMAGE_SVG_NEAR_ICON.to_string()),
                 base_uri: None,
                 reference: None,