LT-21988: Improve Hermit Crab performance

[jtmaxwell3]

I improve Hermit Crab performance by incorporating a new version of SIL.Machine.HermitCrab which improves the performance of strata and by adding a Strata field to the HC Parser Parameters. The combination improved performance of parsing all of the words in the test project from ~3 hours to ~10 minutes if the Strata field is set to "Templates, [C]ɔ-". How to use the Strata field will have to be documented somewhere.

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This change is 

[JakeOliver28]

Reviewable status: 0 of 14 files reviewed, 3 unresolved discussions

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Src/LexText/ParserCore/HCLoader.cs line 354 at r1 (raw file):

				{
					// Save these classes for later.
					if (rule == "Clitics")

A switch statement would seem more natural here.

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Src/LexText/ParserCore/HCLoader.cs line 434 at r1 (raw file):

			// Remove empty strata.
			foreach (Stratum stratum in m_language.Strata.ToList())

This foreach could be shortened to this:

Code snippet:

m_language.Strata.RemoveAll(stratum =>
        !stratum.Entries.Any() &&
        !stratum.AffixTemplates.Any() &&
        !stratum.MorphologicalRules.Any() &&
        !stratum.PhonologicalRules.Any());
        
        
// if that's not readable enough, we could also do this
var filterFunction = stratum =>
        !stratum.Entries.Any() &&
        !stratum.AffixTemplates.Any() &&
        !stratum.MorphologicalRules.Any() &&
        !stratum.PhonologicalRules.Any();
        
m_language.Strata.RemoveAll(filterFunction);

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Src/LexText/ParserCore/HCLoader.cs line 455 at r1 (raw file):

		}

		bool MoveRule(string ruleName, Stratum source, Stratum target)

We could remove redundancy with a helper method here.

Code snippet:

private bool MoveRule(string ruleName, Stratum source, Stratum target)
{
    bool found = false;

    found |= MoveMatchingItems(source.Entries, target.Entries, entry => m_entryName[entry] == ruleName);
    found |= MoveMatchingItems(source.MorphologicalRules, target.MorphologicalRules, rule => rule.Name == ruleName);
    found |= MoveMatchingItems(source.PhonologicalRules, target.PhonologicalRules, rule => rule.Name == ruleName);
    found |= MoveMatchingItems(source.AffixTemplates, target.AffixTemplates, rule => rule.Name == ruleName);

    return found;
}

private bool MoveMatchingItems<T>(IList<T> source, IList<T> target, Func<T, bool> filterFunction)
{
    var itemsToMove = source.Where(filterFunction).ToList();
    if (itemsToMove.Count == 0) return false;

    foreach (var item in itemsToMove)
    {
        target.Add(item);
        source.Remove(item);
    }
    
    return true;
}