spec(types,plugin-detail,vscode-extension): TS twins of the zod-only node arms, the README's Activity tab on its declared properties, and Export to React's typed schema constant (objectui#11515)

spec(types,plugin-detail,vscode-extension): TS twins of the zod-only node arms, the README's Activity tab on its declared properties, and Export to React's typed schema constant (objectui#11515) #12127