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

hostfile/hostfile.go

@@ -9,8 +9,8 @@ import (
 )
 
 const (
-	StartMarker = "# DNSHelper <<-> START CONFIG"
-	EndMarker   = "# DNSHelper <->> END CONFIG"
+	StartMarker = "# ekDNSHelper <<-> START CONFIG"
+	EndMarker   = "# ekDNSHelper <->> END CONFIG"
 )
 
 // DNSEntry represents a single IP-to-hostname mapping.
@@ -116,7 +116,7 @@ func (m *Manager) Write(hf *HostsFile, backupDir string) error {
 	//    This is required so the subsequent rename stays on the same filesystem
 	//    partition (avoids EXDEV on Unix).
 	success := false
-	tempFile, err := m.fs.CreateTemp(filepath.Dir(hf.Path), ".dns-helper-tmp-*")
+	tempFile, err := m.fs.CreateTemp(filepath.Dir(hf.Path), ".ekdns-tmp-*")
 	if err != nil {
 		m.fs.Remove(backupPath) //nolint:errcheck
 		return fmt.Errorf("creating temp file: %w", err)