Refactor to consolidate APIs into contract package and introduce NFT interface for better modularity and maintainability.

contract/nft/table.go

@@ -0,0 +1,24 @@
+package nft
+
+import "git.kor-elf.net/kor-elf-shield/go-nftables-client/family"
+
+// Table for working with tables.
+type Table interface {
+	// AddTable adds a new table.
+	//
+	// This command is equivalent to:
+	//     nft add table (ip|ip6|inet|arp|bridge) {table_name}
+	Add(family family.Type, tableName string) error
+
+	// DeleteTable deletes a table.
+	//
+	// This command is equivalent to:
+	//     nft delete table (ip|ip6|inet|arp|bridge) {table_name}
+	Delete(family family.Type, tableName string) error
+
+	// ClearTable clears all rules in a table.
+	//
+	// This command is equivalent to:
+	//     nft flush table (ip|ip6|inet|arp|bridge) {table_name}
+	Clear(family family.Type, tableName string) error
+}