feat(content): implement advanced NFT tokenization, marketplace

contracts/governance/src/curation.rs

@@ -0,0 +1,5 @@
+pub struct QualityVote {
+    pub token_id: u64,
+    pub voter: Address,
+    pub score: u8,
+}

contracts/insurance/src/content_protection.rs

@@ -0,0 +1,13 @@
+pub struct ContentInsurancePolicy {
+    pub token_id: u64,
+    pub coverage_amount: u128,
+    pub premium_paid: u128,
+    pub active: bool,
+}
+
+pub struct Order {
+    pub token_id: u64,
+    pub trader: Address,
+    pub price: u128,
+    pub is_buy: bool,
+}