[docs] Added separate metrics logging in case of CompositeDataset

[docs] Updated conformer train and inference configs

[fix] Updated `from_pretrained` in conformer model(BUGGED)

[feat] Added CosineScheduler

[feat] Added `n_iterations` param to CompositeDataset(BUGGED)

[fix] Added reduction to MetricCallback

[feat] Added ValidationCallback

Запрос на слияние 'composite_dataset' (#1) из composite_dataset в dev

[style] Extended error in CSVLoggerCallback

[style] Refactored Conformer's config and forward

[fix] Updated CompositeDataset

Merge branch 'dev' into composite_dataset

[style] Extended error in CSVLoggerCallback

[style] Refactored Conformer's config and forward

[fix] Updated CompositeDataset

Merge branch 'dev' into composite_dataset

Merge remote-tracking branch 'origin/dev' into dev

[feat] Added ConformerModel (draft)

[feat] Added ConformerModel (draft)

[feat] Added create_mask method

[fix] Added strict to wav2vec2 for consistency

[bug] Fixed warning about multichannel

[feat] Added ZeroDataset

[feat] Add skip_special_tokens param to CTCDecoder

[style] Some cosmetics and updated TrainPipeline image

[feat] Updated ya_download script

[docs] Added nemo integration question

[fix] torch no_grad during inference

[style] Updated train pipeline

- Added draft ConformerModel

- Added CSVLoggerCallback - Changed quotes in inference.py - Added to_csv callback to inference scripts - Now AudioDataset also returns 'path'