Added FisheryLib.Collections.FishTable and Mono.Cecil extension methods

A bit of refactoring has been done too

Source/FisheryLib/StopwatchExtensions.cs

@@ -0,0 +1,27 @@
+// Copyright (c) 2022 bradson
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v.2.0.If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+using System.Diagnostics;
+using JetBrains.Annotations;
+
+namespace FisheryLib;
+
+[PublicAPI]
+public static class StopwatchExtensions
+{
+	public static decimal ElapsedMilliSecondsAccurate(this Stopwatch stopwatch)
+		=> stopwatch.ElapsedTicks / (_frequency / 1000m);
+
+	public static decimal ElapsedSecondsAccurate(this Stopwatch stopwatch)
+		=> stopwatch.ElapsedTicks / _frequency;
+
+	public static decimal ElapsedMicroSeconds(this Stopwatch stopwatch)
+		=> stopwatch.ElapsedTicks / (_frequency / 1e6m);
+
+	public static decimal ElapsedNanoSeconds(this Stopwatch stopwatch)
+		=> stopwatch.ElapsedTicks / (_frequency / 1e9m);
+
+	private static decimal _frequency = Stopwatch.Frequency;
+}