feat(custom-gauge): implementation of custom arc gauge

lib/fa_flutter_ui_kit.dart

@@ -1,14 +1,15 @@
 library fa_flutter_ui_kit;
 
+export 'src/app/index.dart';
 export 'src/config/index.dart';
 export 'src/constants/index.dart';
+export 'src/core/location_info/index.dart';
 export 'src/data/index.dart';
-export 'src/modules/day_start/index.dart';
+export 'src/modules/custom_gauge/index.dart';
 export 'src/modules/day_end/index.dart';
+export 'src/modules/day_start/index.dart';
 export 'src/modules/index.dart';
 export 'src/navigator/index.dart';
 export 'src/utils/index.dart';
-export 'src/widgets/index.dart';
-export 'src/app/index.dart';
-export 'src/core/location_info/index.dart';
 export 'src/widgets/common/multi_select_items/multi_select_flutter.dart';
+export 'src/widgets/index.dart';

lib/src/modules/custom_gauge/custom_gauge_painter.dart

@@ -0,0 +1,69 @@
+import 'dart:math';
+
+import 'package:flutter/material.dart';
+
+class CustomGaugePainter extends CustomPainter {
+  CustomGaugePainter({
+    required this.currentValue,
+    required this.targetValue,
+    required this.gaugeColor,
+    required this.backgroundColor,
+  });
+
+  final double currentValue;
+  final double targetValue;
+  final Color gaugeColor;
+  final Color backgroundColor;
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    final paint = Paint()
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = 40;
+
+    final center = Offset(size.width / 2, size.height);
+
+    paint.color = backgroundColor;
+    canvas.drawArc(
+      Rect.fromCircle(center: center, radius: 100),
+      pi,
+      pi,
+      false,
+      paint,
+    );
+
+    paint.color = gaugeColor;
+    final sweepAngle = (pi * currentValue) / targetValue;
+    canvas.drawArc(
+      Rect.fromCircle(center: center, radius: 100),
+      pi,
+      sweepAngle,
+      false,
+      paint,
+    );
+
+    final startLabelPainter = TextPainter(
+      text: TextSpan(
+          text: '0', style: TextStyle(color: Colors.black, fontSize: 16)),
+      textDirection: TextDirection.ltr,
+    );
+    startLabelPainter
+      ..layout()
+      ..paint(canvas, Offset(center.dx - 110, size.height + 10));
+
+    final targetLabelPainter = TextPainter(
+      text: TextSpan(
+        text: targetValue.toString(),
+        style: TextStyle(color: Colors.black, fontSize: 16),
+      ),
+      textDirection: TextDirection.ltr,
+    );
+    targetLabelPainter.layout();
+    targetLabelPainter.paint(canvas, Offset(center.dx + 80, size.height + 10));
+  }
+
+  @override
+  bool shouldRepaint(covariant CustomPainter oldDelegate) {
+    return true;
+  }
+}

lib/src/modules/custom_gauge/index.dart

@@ -0,0 +1 @@
+export 'custom_gauge_painter.dart';