Enable v3 validation support

[smoya]

Relates to #641

AsyncAPI v3 is still WIP. We are in a very advanced position, however there are still blockers for early releasing something users can use.
In order to let users test AsyncAPI v3 in advance, I suggest we aim to release a beta version (as a release candidate) version of Studio with the support of the very basics: validating ASyncAPI v3 documents. That means no documentation or code generation, no Spectral rules, etc. Just JSON Schema validation. We will add all those features later progressively.

This issue aims to list and track all the work needed to make this version happen.

Scope

• AsyncAPI spec v3 support in JSON Schema files spec-json-schemas#400
• ParserJS: validate document only with the AsyncAPI v3 JSON Schema parser-js#817
• Studio: Enable Spec 3.0 validation only #746
• CLI: validate command should validate AsyncAPI Spec v3 documents cli#770

Studio: Enable validation only

Disable everything except the editor tab and document validation. Use ParserJS rc + JSON Schema rc.

[shapeit-bot]

Thanks for creating a new pitch 🥳. You can now create or link existing scopes.
You can create new scopes in two different ways:

Option 1

1. Edit the Pitch or Bet issue
2. Add your scope under the scope section

See this example

Option 2

1. Create a new issue
2. Add this keywork in the description related to #ISSUE_BET_NUMBER

See this example