Feature/lexer issue 58

[Stepami]

Description

Алгоритм пришлось поменять на такой:

LinkedList<int> indices = [];
while (true)
{
    var start = indices.Last != null ? indices.Last.Value + 1 : 0;
    if (start == textLength)
        break;
    var textAsSpan = newText.AsSpan(
        start,
        length: textLength - start);
    var index = textAsSpan.IndexOfAny(_sv);
    indices.AddLast(start + index);
}

Related Issues

Closes #58

References

Checklist:

• I have followed the contribution guidelines and code style for this project.
• I have added tests covering my contributions.
• I have updated the documentation accordingly.
• I have added corresponding labels with respect to the part of the interpreter i've worked on.

[github-actions]

File	Coverage	Branches		Missing
All files	42%	37%	✅
HydraScript.Lib.FrontEnd.GetTokens.Impl.Lexer	91%	83%	✅
HydraScript.Lib.BackEnd.Instructions.WithJump.Goto	81%	100%	✅	9 14-15

Minimum allowed coverage is 20%

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