feat: 直播画质切换

Closes #146

Co-authored-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/models/live/quality.dart

@@ -0,0 +1,43 @@
+enum LiveQuality {
+  dolby,
+  super4K,
+  origin,
+  veryHigh,
+  bluRay,
+  superHD,
+  smooth,
+  flunt,
+}
+
+extension LiveQualityCode on LiveQuality {
+  static final List<int> _codeList = [
+    30000,
+    20000,
+    10000,
+    400,
+    250,
+    150,
+    80,
+  ];
+  int get code => _codeList[index];
+
+  static LiveQuality? fromCode(int code) {
+    final index = _codeList.indexOf(code);
+    if (index != -1) {
+      return LiveQuality.values[index];
+    }
+    return null;
+  }
+}
+
+extension VideoQualityDesc on LiveQuality {
+  static final List<String> _descList = [
+    '杜比',
+    '4K',
+    '原画',
+    '蓝光',
+    '超清',
+    '流畅',
+  ];
+  get description => _descList[index];
+}