OMS Bid Adapter: add video support, test coverage and update documentation

[siminkovladyslav]

Type of change

• Feature

Description of change

• Adding video support
• Adding test coverage for video cases interpretResponse and buildRequests functions
• Updating the documentation

Other information

PR with updating Prebid.org docs

[github-actions]

Whoa there, partner! 🌵🤠 We wrangled some duplicated code in your PR:

• modules/omsBidAdapter.js has 10 duplicated lines with modules/onomagicBidAdapter.js

Reducing code duplication by importing common functions from a library not only makes our code cleaner but also easier to maintain. Please move the common code from both files into a library and import it in each. We hate that we have to mention this, however, commits designed to hide from this utility by renaming variables or reordering an object are poor conduct. We will not look upon them kindly! Keep up the great work! 🚀