Phoneme conversion presets

[adlez27]

Writing presets:
Testing presets:

I plan to write the following presets.

• SynthV Japanese to Vocaloid Japanese
• Vocaloid Japanese to SynthV Japanese
• SynthV English to Vocaloid English
• SynthV English to OpenUtau ARPAsing
• SynthV English to OpenUtau X-SAMPA
• SynthV English to OpenUtau VCCV
• Vocaloid English to SynthV English
• Vocaloid English to OpenUtau ARPAsing
• Vocaloid English to OpenUtau X-SAMPA
• Vocaloid English to OpenUtau VCCV
• OpenUtau ARPAsing to SynthV English
• OpenUtau ARPAsing to Vocaloid English
• OpenUtau ARPAsing to OpenUtau X-SAMPA
• OpenUtau ARPAsing to OpenUtau VCCV
• OpenUtau X-SAMPA to SynthV English
• OpenUtau X-SAMPA to Vocaloid English
• OpenUtau X-SAMPA to OpenUtau ARPAsing
• OpenUtau X-SAMPA to OpenUtau VCCV
• OpenUtau VCCV to SynthV English
• OpenUtau VCCV to Vocaloid English
• OpenUtau VCCV to OpenUtau ARPAsing
• OpenUtau VCCV to OpenUtau X-SAMPA

A separate PR will be made for presets related to OpenUtau's EN2JA phonemizer.

[adlez27]

Due to the large number of presets being added, the list of presets will now be filtered based on the source/target project format.

[adlez27]

Keeping track of already-converted phonemes prevents them from getting double converted. Coincidentally this also allows us to use the same multi-phoneme groups multiple times in one note.

[sdercolin]

LGTM! Thank you for the hard work!