[ruby] BiDi code examples

[TamsilAmani]

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Description

Code examples for BiDi APIs

Motivation and Context

Users can refer this to check how to use BiDi APIs in their projects

Types of changes

• Change to the site (I have double-checked the Netlify deployment, and my changes look good)
• Code example added (and I also added the example to all translated languages)
• Improved translation
• Added new translation (and I also added a notice to each document missing translation)

Checklist

• I have read the contributing document.
• I have used hugo to render the site/docs locally and I am sure it works.

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[titusfortner]

I've updated the files with where tests are supposed to go: https://github.com/SeleniumHQ/seleniumhq.github.io/tree/trunk/examples/ruby/spec/bidirectional