Added sidekick library

[sselvara]

Please always provide the GitHub issue(s) your PR is for, as well as test URLs where your change can be observed (before and after):

Fix #27

Test URLs:

• Before: https://main--airindia--hlxsites.hlx.live/in/en/book/special-offers/global-connectivity
• After: https://sidekick-library--airindia--hlxsites.hlx.live/in/en/book/special-offers/global-connectivity

[aem-code-sync[bot]]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed. In case there are problems, just click a checkbox below to rerun the respective action.

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Commits

* [82e76d6](https://github.com/hlxsites/airindia/pull/29/commits/82e76d697d5e8f51f387e9ede4f014e33bbdec1f) :white_check_mark: (latest) * [5a812bd](https://github.com/hlxsites/airindia/pull/29/commits/5a812bd41972b14b3c178c03527dfe997cca0712) :white_check_mark:

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/in/en/book/special-offers/global-connectivity

[sselvara]

Library Link: https://sidekick-library--airindia--hlxsites.hlx.page/tools/sidekick/library.html?plugin=blocks&path=/tools/sidekick/library/blocks/hero&index=0