feat: new rsm012 xml writter

[MadsDue]

Description

see title

References

Checklist

• Should the change be behind a feature flag?
• Can the feature be meaningfully disabled or circumvented if there are issues (e.g., database-breaking changes)?
• Has it been considered whether data is being delivered to the wrong actor?
• Subsystem test executed (dev_002/dev_003) => https://github.com/Energinet-DataHub/dh3-environments/actions/runs/12135729538
• Is there time to monitor state of the release to Production?
• Reference to the task => https://app.zenhub.com/workspaces/mosaic-60a6105157304f00119be86e/issues/gh/energinet-datahub/team-mosaic/377

[github-actions]

Test results for \source\Edi.UnitTests\bin\Release\net8.0\Energinet.DataHub.Wholesale.Edi.UnitTests.dll

274 tests   274 ✅  3s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit 14a5247.

♻️ This comment has been updated with latest results.

[github-actions]

Test results for \source\Tests\bin\Release\net8.0\Energinet.DataHub.EDI.Tests.dll

1 565 tests   1 565 ✅  19s ⏱️
    1 suites      0 💤
    1 files        0 ❌

Results for commit 6991332.

♻️ This comment has been updated with latest results.

[github-actions]

Test results for \source\IntegrationTests\bin\Release\net8.0\Energinet.DataHub.EDI.IntegrationTests.dll

20 tests   20 ✅  3m 25s ⏱️
 1 suites   0 💤
 1 files     0 ❌

Results for commit 0097b46.

♻️ This comment has been updated with latest results.