Cut major release v1.0.0 🚀

• Ensure the e2e nightly tests on v1.x are passing for at least a couple of days before cutting the release.
• Update docs/tutorials/forum-application/9.run-app.md to mention v1.0.0
• Update version.go
• Update summary.md in .changelog
• Update CHANGELOG.md
• Bump github.com/cometbft/cometbft/api from 1.0.0-rc2 to 1.0.0 in go.mod
  • ensure cometbft/api is tagged first (chore(release) - tag cometbft/api for v1.0.0 release #4666)
  • add changelog entry
• Publish protos to Buf registry

References:

• https://github.com/cometbft/cometbft/blob/main/RELEASES.md#major-release