Export internal services from the plugin

[davidjamesstone]

Proposed change

Export the internal services from the plugin so they can be used in the consuming application.

E.g.

import { submit } from '@defra/forms-engine-plugin/services/notifyService.js'

Azure DevOps work item:

Type of change

• [] Bug fix
• New feature
• [] Breaking change
• [] Misc. (documentation, build updates, etc)

Checklist

• You have executed this code locally and it performs as expected.
• [] You have added tests to verify your code works.
• You have added code comments and JSDoc, where appropriate.
• [] There is no commented-out code.
• [] You have added developer docs in README.md and docs/* (where appropriate, e.g. new features).
• [] The tests are passing (npm run test).
• [] The linting checks are passing (npm run lint).
• [] The code has been formatted (npm run format).

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud