= split tools into several 'aide' classes

= remove test-old since i think most of that functionality has been transfered
= added FibSquares function

Author: rasberry

.gitignore

@@ -364,4 +364,3 @@ test.sh
 /stuff
 /build
 /Writer/wiki/*
-/test-old

Core/Aides/IgnoreCaseAide.cs

@@ -0,0 +1,22 @@
+namespace ImageFunctions.Core.Aides;
+
+public static class IgnoreCaseAide
+{
+	public static bool EqualsIC(this string sub, string test)
+	{
+		if(sub == null) { return false; }
+		return sub.Equals(test, StringComparison.OrdinalIgnoreCase);
+	}
+
+	public static bool StartsWithIC(this string sub, string test)
+	{
+		if(sub == null) { return false; }
+		return sub.StartsWith(test, StringComparison.OrdinalIgnoreCase);
+	}
+
+	public static bool EndsWithIC(this string sub, string test)
+	{
+		if(sub == null) { return false; }
+		return sub.EndsWith(test, StringComparison.OrdinalIgnoreCase);
+	}
+}