fix(ocr): align RapidOCR english assets with 3.8 mobile models (#3291)

* fix(ocr): support language selection for RapidOCR engine

Allows specifying 'english' or 'chinese' via the --ocr-lang flag and automatically downloads the correct models.

Signed-off-by: DevAbdullah90 <abdullahkashif12b3@gmail.com>

* fix(ocr): fix linting and add unit tests for RapidOCR language selection

Signed-off-by: DevAbdullah90 <abdullahkashif12b3@gmail.com>

* fix(ocr): align RapidOCR english assets with 3.8 mobile models

Signed-off-by: Georg Heiler <georg.kf.heiler@gmail.com>

* fix(ocr): restore RapidOCR default model compatibility

Signed-off-by: Georg Heiler <georg.kf.heiler@gmail.com>

* fix(examples): disable OCR in code formula comparison

Signed-off-by: Georg Heiler <georg.kf.heiler@gmail.com>

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Signed-off-by: DevAbdullah90 <abdullahkashif12b3@gmail.com>
Signed-off-by: Georg Heiler <georg.kf.heiler@gmail.com>
Co-authored-by: DevAbdullah90 <abdullahkashif12b3@gmail.com>