feat: add linkedin extension support

[sambhavgupta0705]

this pr add essential schemas to add support for linkedin extension
asyncapi/extensions-catalog#78
cc: @derberg

[derberg]

🚀

[derberg]

Anyone else wanna have a look?

With this PR @sambhavgupta0705 basically validates that https://github.com/asyncapi/spec-json-schemas?tab=readme-ov-file#extensions instruction works. Also simplistic contribution flow to asyncapi/extensions-catalog#144 works as well.

Once we merge this I think we can say we have super minor nice MVP of extension catalog:

• we can onboard new extensions in https://github.com/asyncapi/extensions-catalog
• and we can even onboard them in official json schema https://github.com/asyncapi/spec-json-schemas
• we also have automation to automatically render docs to new extensions in docs https://www.asyncapi.com/docs/reference/extensions/x
• we also figured the best way to have extensions support in react component React Components for extensions Catalog asyncapi-react#819 that is already in progress to be developed and contributed by folks from SAP. I asked them that in their contribution they could out of the box provide extension from x-x and x-linkedin extensions.

[smoya]

Simple change requested here #528 (comment)

The rest LGTM 👍 🚀

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[smoya]

LGTM! 🚀🌔

[derberg]

/rtm

[asyncapi-bot]

🎉 This PR is included in version 6.7.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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