AsyncAPI spec v3 support in server-api

[jonaslagoni]

Reason/Context

This Issue is used to track changes needed to support AsyncAPI v3. As a code owner, please edit this list of TODO tasks in order to properly track the progress 🙂 Once this issue is closed it means that v3 is now fully supported in this library.

Scope

• [ ] Migrate to new JS parser API
• [x] https://github.com/asyncapi/bundler/issues/133
• [ ] https://github.com/asyncapi/converter-js/issues/110
• [x] https://github.com/asyncapi/diff/issues/154
• [ ] https://github.com/asyncapi/dotnet-nats-template/issues/384
• [x] https://github.com/asyncapi/generator/issues/979
• [x] https://github.com/asyncapi/go-watermill-template/issues/243
• [x] https://github.com/asyncapi/html-template/issues/430
• [x] https://github.com/asyncapi/java-spring-cloud-stream-template/issues/336
• [x] https://github.com/asyncapi/java-spring-template/issues/308
• [x] https://github.com/asyncapi/java-template/issues/118
• [x] https://github.com/asyncapi/markdown-template/issues/341
• [x] https://github.com/asyncapi/nodejs-template/issues/215
• [x] https://github.com/asyncapi/nodejs-ws-template/issues/294
• [x] https://github.com/asyncapi/parser-js/issues/780
• [x] https://github.com/asyncapi/python-paho-template/issues/189
• [x] https://github.com/asyncapi/spec-json-schemas/issues/400
• [x] https://github.com/asyncapi/ts-nats-template/issues/545

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