Version bump sub project `nr-theme` for initial (manual) publish

[Steve-Mcl]

Description

Version bump sub project nr-theme to 1.8.0 (as per current release) so that when we can publish latest agent with a dependancy on 1.8.0 (need to npm i to get package lock updated.

Related Issue(s)

https://github.com/flowforge/flowforge-device-agent/issues/89

Checklist

• [x] I have read the contribution guidelines
• [ ] Suitable unit/system level tests have been added and they pass
• [ ] Documentation has been updated
  • [ ] Upgrade instructions
  • [ ] Configuration details
  • [ ] Concepts
• [ ] Changes flowforge.yml?
  • [ ] Issue/PR raised on flowforge/helm to update ConfigMap Template
  • [ ] Issue/PR raised on flowforge/CloudProject to update values for Staging/Production

Labels

• [ ] Backport needed? -> add the backport label
• [ ] Includes a DB migration? -> add the area:migration label