fix: rename Go module path to gitea.hansenits.com.au/hits/ExploreDNS

- Update go.mod module declaration
- Update all internal import paths in .go files
- Update go install lines in README.md

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: multica-agent <github@multica.ai>

internal/traverse/response.go

@@ -3,7 +3,7 @@ package traverse
 import (
 	"net"
 
-	"github.com/hits/ExploreDNS/internal/dns"
+	"gitea.hansenits.com.au/hits/ExploreDNS/internal/dns"
 	miekgdns "github.com/miekg/dns"
 )