chore: release 1.0.0

[dj8yfo]

It concludes the epic preparation for stability outlined in #51!

1.0.0 release is tested and even has open draft PRs ready to be reviewed and merged after the stable release is published:

• https://github.com/near/nearcore/pull/9432
• https://github.com/near/near-sdk-rs/pull/1075