Add .readalong format output to synthesize

[joanise]

See EveryVoiceTTS/FastSpeech2_lightning#102
Also related: ReadAlongs/Studio#253

Fixes #439

This PR fetches readalong from github, because it depends on an unmerged and unpublished feature there.

This will get cleaned up in the merging process, so please review and test as is anyway.

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
everyvoice/tests/test_configs.py	66% smaller
everyvoice/model/feature_prediction/FastSpeech2_lightning	0% smaller
pyproject.toml	Unsupported file format

[github-actions]

CLI load time: 0:00.33
Pull Request HEAD: 45d06851fde46e00d9c917042d7174e702b4b190
Imports that take more than 0.1 s:
import time: self [us] | cumulative | imported package
import time:      1038 |     102302 |     typer.main
import time:       291 |     121066 |   typer
import time:       244 |     100325 |       everyvoice.model.feature_prediction.FastSpeech2_lightning.fs2.cli.cli
import time:       175 |     100943 |     everyvoice.model.feature_prediction.FastSpeech2_lightning.fs2.cli
import time:        18 |     100961 |   everyvoice.model.feature_prediction.FastSpeech2_lightning.fs2.cli.preprocess
import time:      7575 |     257559 | everyvoice.cli

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.74%. Comparing base (f4c88c9) to head (45d0685).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #607   +/-   ##
=======================================
  Coverage   76.74%   76.74%           
=======================================
  Files          46       46           
  Lines        3445     3445           
  Branches      470      470           
=======================================
  Hits         2644     2644           
  Misses        700      700           
  Partials      101      101           

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