[Release] v1.12.0

[mgovers]

Before release

• Check all PRs/issues were merged & resolved
  • [FEATURE] Support current measurement in state estimation #547
  • [FEATURE] Support local + global current measurement for iterative current SE #764
  • [FEATURE] Support local current measurement for Newton-Raphson SE #765
  • [FEATURE] Support global current measurement for Newton-Raphson SE #967
  • NRSE current sensor: Remove experimental feature flag global sensor #1062
  • Double-check that all documentation is there (including for the calculation types)
• Update VERSION file if applicable
• Make PR
• Merge PR

After release

• Update the release notes
  • Add Highlights section if needed
    * [ ] Any breaking changes: explain + provide migration approach
  • Any deprecations: explain + provide migration approach
• Share with stakeholders
  • Notify maintainers
  • Post to PGM LF Energy mailing list
  • Post to PGM LF Energy Slack channel
  • Post to LinkedIn
  • Share in sprint review