♻️ refactor: split src into internal packages and cmd

internal/logx/logx_test.go

@@ -0,0 +1,10 @@
+package logx
+
+import "testing"
+
+func TestSanitizeNStopsAtLimit(t *testing.T) {
+	input := "ab\x00cdefghijklmnopqrstuvwxyz"
+	if got := SanitizeN(input, 4); got != "ab�c…" {
+		t.Fatalf("SanitizeN = %q", got)
+	}
+}