feat(server):generate args types for assistant functions and validate args schema

[yuval-hazaz]

Close: #8443

PR Details

• Add the functions JSON definition files into the server folder
• Generate types for the functions args
• Use the generated types for all function args (input)
• Validate the input received from OpenAI against the JSON schema
• Add a prebuild script on amplication-server to generate the types before build

PR Checklist

• Tests for the changes have been added
• npm test doesn't throw any error

IMPORTANT: Please review the CONTRIBUTING.md file for detailed contributing guidelines.

[nx-cloud]

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✅ Successfully ran 2 targets

• nx e2e amplication-server --prod
• nx e2e data-service-generator --prod

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[mulygottlieb]

@overbit I approved this, but I think it would be nice if you looked just FYI (this will be the beginning of doing an "infrastructure as code" approach for the OpenAI assistant definitions, and it connects to https://github.com/amplication/private-issues/issues/184