Port NBT impl from LibAC Dart

NBT/FloatTag.cs

@@ -0,0 +1,66 @@
+using System;
+using LibAC.NBT.API;
+
+namespace LibAC.NBT
+{
+    public class FloatTag : Tag
+    {
+        public float value { get; private set; } = 0.0f;
+
+        public FloatTag() { }
+
+        private FloatTag(float value)
+        {
+            this.value = value;
+        }
+
+        public static FloatTag ValueOf(float value)
+        {
+            return new FloatTag(value);
+        }
+
+        public override void ReadValue(ByteLayer data)
+        {
+            value = data.ReadFloat();
+        }
+
+        public override void WriteValue(ByteLayer data)
+        {
+            data.WriteFloat(value);
+        }
+
+        public override TagType GetTagType()
+        {
+            return TagType.Float;
+        }
+
+        public override object GetValue()
+        {
+            return value;
+        }
+
+        public override void SetValue(object val)
+        {
+            if (val is float)
+            {
+                value = (float)val;
+            }
+        }
+
+        public override void PrettyPrint(int indent, bool recurse)
+        {
+            Console.WriteLine($"{new string('\t', indent)}{Tag.GetCanonicalName(GetTagType())}: {value}");
+        }
+
+        public override void WriteStringifiedValue(StringBuilder builder, int indent, bool isList)
+        {
+            builder.Append($"{(isList ? new string('\t', indent) : "")}{value}f");
+        }
+
+        public override void ReadStringifiedValue(StringReader reader)
+        {
+            value = float.Parse(reader.ReadNumber());
+            reader.Expect('f');
+        }
+    }
+}