SBP Update and Fixes

[Cadlaxa]

• Implemented pre-utterance alias length (reads the alias oto parameters from left blank to preutter) every child SBP phonemizer will implement this to their end:

// true: endings end in a 50-tick gap
// false: uses the alias length instead
protected override bool NoGap => true;

protected override double GetTransitionBasicLengthMs(string alias, int tone, PhonemeAttributes attr) {
    double otoLength = GetTransitionBasicLengthMsByOto(alias, tone, attr);
    return otoLength;
}

• Fixed pitch suffix bug in AssignAllAffixes where it assigns wrong pitch to tones other than vowelTone
• Implemented IsGlide bool (might change this implementation since it's just a boolean to trigger the offset anchoring of the aliases)
• Small code refactor