chore(cli): add changeset for effa sync (post-merge backfill)

[patroza]

Summary

Backfill missing changeset for #764 (effa sync / sync-diff / sync-push). Branch was merged without one.

@effect-app/cli: minor — new sync subcommands.

🤖 Generated with Claude Code

[pkg-pr-new]

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@effect-app/cli

npm i https://pkg.pr.new/effect-app/libs/@effect-app/cli@767

effect-app

npm i https://pkg.pr.new/effect-app/libs/effect-app@767

@effect-app/eslint-codegen-model

npm i https://pkg.pr.new/effect-app/libs/@effect-app/eslint-codegen-model@767

@effect-app/eslint-shared-config

npm i https://pkg.pr.new/effect-app/libs/@effect-app/eslint-shared-config@767

@effect-app/infra

npm i https://pkg.pr.new/effect-app/libs/@effect-app/infra@767

@effect-app/vue

npm i https://pkg.pr.new/effect-app/libs/@effect-app/vue@767

@effect-app/vue-components

npm i https://pkg.pr.new/effect-app/libs/@effect-app/vue-components@767

commit: 8aa0a50