acc: extend top_disjuncts and top_conjuncts to acc_cond as well

* spot/twa/acc.hh, spot/twa/acc.cc: Implement the new methods.
* python/spot/impl.i: Add bindings for vectors of acc_cond.
* tests/python/acc_cond.ipynb: Test the two methods.
* NEWS: Adjust.

tests/python/acc_cond.ipynb

@@ -1383,6 +1383,32 @@
     "print(acc)\n",
     "print(acc.unsat_mark())"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "`top_conjuncts` and `top_disjuncts` also work on `acc_cond`.  In this case they return tuple of `acc_cond` with the same number of sets."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 54,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "(spot.acc_cond(4, \"(Fin(0) | Inf(1)) & (Fin(2) | Inf(3))\"),)\n",
+      "(spot.acc_cond(4, \"Fin(0) | Inf(1)\"), spot.acc_cond(4, \"Fin(2) | Inf(3)\"))\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(acc.top_disjuncts())\n",
+    "print(acc.top_conjuncts())"
+   ]
   }
  ],
  "metadata": {