Complete the POC to add the export schema feature in the schema tab:

• Add a button triggering a dialog to choose the exported format and relative options (done)
• Remove the "Share schema as JSON" menu entry
• Move the conversion functions to mongodb-schema
• Write tests
• Review with design

Open questions:

• How does it integrate with the "Hackolade" banner?
• Do we want to keep the "share" to internal format?

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• Poc: https://github.com/mongodb-js/compass/tree/export-schema
• Diff: https://github.com/mongodb-js/compass/compare/main...export-schema