feat(ocr): expose rec_keys_path in RapidOcrOptions to support custom dictionaries

[terwey]

• Added rec_keys_path to RapidOcrOptions to align with RapidOCR's capability to use custom character dictionaries.
• Passed rec_keys_path to RapidOcrModel initialization, ensuring the recognition model can load the correct dictionary (e.g., for Latin characters).

Checklist:

• Documentation has been updated, if necessary.
• Examples have been added, if necessary.
• Tests have been added, if necessary.

[mergify]

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• title ~= ^(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert)(?:\(.+\))?(!)?:

[dolfim-ibm]

Thanks @terwey for your first contribution. Before we can approve and merge this, we require you to rebase your commit with a sign-off. See the the CONTRIBUTING.md guidelines.

In practice, these steps should do it.

To add your Signed-off-by line to every commit in this branch:

Ensure you have a local copy of your branch by checking out the pull request locally via command line.
In your local branch, run: git rebase HEAD~1 --signoff
Force push your changes to overwrite the branch: git push --force-with-lease origin rapidocr_rec_keys

[dolfim-ibm]

lgtm

[dolfim-ibm]

@terwey it looks like you pushed without running the pre-commit hooks which now are failing in tests. Can you please patch your PR?

For example running

poetry run pre-commit run --all-files