Sequence: IList<> implementation

[viceroypenguin]

This PR changes Sequence and Range to use an IList<> implementation to improve performance.

Fixes #416

// * Summary *

BenchmarkDotNet=v0.13.5, OS=Windows 11 (10.0.22621.1702/22H2/2022Update/SunValley2)
12th Gen Intel Core i7-12700H, 1 CPU, 20 logical and 14 physical cores
.NET SDK=8.0.100-preview.3.23178.7
  [Host] : .NET 7.0.5 (7.0.523.17405), X64 RyuJIT AVX2

Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
SequenceListCount	6.512 ns	0.0806 ns	0.0754 ns	0.0025	0.0000	32 B
SequenceEnumerableCount	26,418.452 ns	119.2042 ns	111.5037 ns	-	-	64 B
SequenceListCopyTo	41,894.557 ns	236.9645 ns	210.0628 ns	3.1738	0.3662	40112 B
SequenceEnumerableCopyTo	43,789.558 ns	320.3513 ns	283.9831 ns	8.4229	0.8545	106256 B
SequenceListElementAt	9.782 ns	0.1094 ns	0.0970 ns	0.0025	0.0000	32 B
SequenceEnumerableElementAt	16,407.080 ns	151.0511 ns	141.2933 ns	-	-	64 B

Code

#load "BenchmarkDotNet"

void Main()
{
	RunBenchmark();
}

[Benchmark]
public void SequenceListCount()
{
	_ = SuperEnumerable.Sequence(0, 10_000, 1).Count();
}

[Benchmark]
public void SequenceListCopyTo()
{
	_ = SuperEnumerable.Sequence(0, 10_000, 1).ToArray();
}

[Benchmark]
public void SequenceListElementAt()
{
	_ = SuperEnumerable.Sequence(0, 10_000, 1).ElementAt(8_000);
}

[Benchmark]
public void SequenceEnumerableCount()
{
	_ = Sequence(0, 10_000, 1).Count();
}

[Benchmark]
public void SequenceEnumerableCopyTo()
{
	_ = Sequence(0, 10_000, 1).ToArray();
}

[Benchmark]
public void SequenceEnumerableElementAt()
{
	_ = Sequence(0, 10_000, 1).ElementAt(8_000);
}

static IEnumerable<int> Sequence(int start, int stop, int step)
{
	long current = start;
	while (step >= 0
			? stop >= current
			: stop <= current)
	{
		yield return (int)current;
		current += step;
	}
}

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (501b5a7) 88.00% compared to head (fa8072b) 88.01%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #417   +/-   ##
=======================================
  Coverage   88.00%   88.01%           
=======================================
  Files         239      239           
  Lines        7489     7498    +9     
  Branches     1722     1725    +3     
=======================================
+ Hits         6591     6599    +8     
- Misses        460      461    +1     
  Partials      438      438           

Impacted Files	Coverage Δ
Source/SuperLinq/Sequence.cs	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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