docs: add newtype Workstation beta downloads

[newtype-01]

Summary

• add newtype Workstation to the English and Chinese product comparison
• link the public Apple Silicon 0.2.0 Beta 1 DMG
• clearly mark the build as unsigned and unnotarized
• document macOS requirements and first-launch instructions
• clarify the boundary between public plugin source and Workstation release binaries

Verified release

• Pre-release: https://github.com/newtype-01/newtype-os/releases/tag/workstation-v0.2.0-beta.1
• DMG size: 62,175,374 bytes
• SHA-256: 9ad3dcbb5b15f8fe51a6a226a73d96e3d438d1c71d9995c4cd997a50df6e8723

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