refactor: Rename project from dns-helper to ekdns across all files and documentation

resolver/modes.go

@@ -8,7 +8,7 @@ import (
 	"strings"
 	"time"
 
-	"dns-helper/platform"
+	"ekdns/platform"
 )
 
 // Resolve performs DNS resolution for hostname using the specified mode and config.
@@ -247,7 +247,7 @@ func addPrivateTLDHint(hostname string, origErr error) error {
 		tld := strings.ToLower(parts[len(parts)-1])
 		if PrivateTLDs[tld] {
 			return fmt.Errorf(
-				"%w\n  Hint: the hostname uses a private TLD (.%s). Try specifying an internal DNS server:\n        dns-helper add -host %s -server <internal-dns-ip>",
+				"%w\n  Hint: the hostname uses a private TLD (.%s). Try specifying an internal DNS server:\n        ekdns add -host %s -server <internal-dns-ip>",
 				origErr, tld, hostname)
 		}
 	}