make torch, transformers, pysrt and spacy optional dependencies

[fcakyon]

fixes https://github.com/LemurPwned/video-sampler/issues/29 cc: @LemurPwned

Summary by Sourcery

Make torch, transformers, pysrt and spacy optional dependencies by moving their imports inside the functions that require them, reducing the need for these packages unless their specific functionality is used.

Enhancements:

• Make torch, transformers, pysrt and spacy optional dependencies by importing them within functions where they are used.

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This pull request makes torch, transformers, and spacy optional dependencies by modifying import statements and type annotations. The changes aim to improve the package's flexibility and reduce unnecessary dependencies for users who don't need specific features.

Updated class diagram for KeywordExtractor and feature model

classDiagram
    class KeywordExtractor {
        +list~str~ keywords
        +spacy.Language nlp
        +set~str~ lemmatized_keywords
        +__init__(keywords: list~str~)
    }

    class FeatureModel {
        +AutoFeatureExtractor extractor
        +ResNetModel model
        +build_feature_model(model_str: str)
    }

    KeywordExtractor --> spacy: uses
    FeatureModel --> transformers: uses

File-Level Changes

Change	Details	Files
Modified type annotation for torch.Tensor	Changed 'torch.Tensor' to 'torch.Tensor' (with quotes) in method signature	video_sampler/gating.py
Made spacy an optional import	Added import statement for spacy inside the KeywordExtractor class init method	video_sampler/language/keyword_capture.py
Made transformers an optional import	Moved import statement for AutoFeatureExtractor and ResNetModel inside the build_feature_model function	video_sampler/visualisation/clustering.py

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[LemurPwned]

Thanks a lot @fcakyon. I'll use this PR to bump the version and add missing base requirements as well

[LemurPwned]

@sourcery-ai review

[sourcery-ai[bot]]

Hi @LemurPwned! 👋

Only authors and team members can run @sourcery-ai commands on public repos.

[LemurPwned]

Thanks again @fcakyon for your contribution!

[fcakyon]

@LemurPwned thanks for your fast response 🙏🏻