wip: advanced preprocessing [english]

[Hormold]

Additional TTS preprocessing for:

• Brackets <> - removes HTML-like tags: "Hello <tag>world" → "Hello world"
• Replace newlines with periods - converts line breaks: "First\nSecond" → "First Second"
• Format numbers - converts to words: "I have 5 apples" → "I have five apples"
• Currency - "$42.50" → "forty two dollars and fifty cents"
• Dates - "2024-12-25" → "Wednesday, December 25, 2024"
• Phone numbers - "555-123-4567" → "5 5 5 1 2 3 4 5 6 7"
• Emails - "[email protected]" → "john at example dot com"
• Percentages, distances, units, times, acronyms

[Hormold]

@longcw one thing: not sure if we need to enable some of these things by default