IONOS(nc-mdi-js): add nc-MaterialDesign-JS as submodule

[printminion-co]

Precondition

• nc-server
  • replace raw mdi icons replace raw mdi icons #54

TODO

• nc-server

  • add nc-mdi-js as submodule #58

• Wait until following PRs are merged. Update submodule pointers to new sha

  • feat(nc-mdi-svg): use nc-MaterialDesign-SVG nc-MaterialDesign-JS#1
  • use nc-mdi-svg nc-vue-material-design-icons#4
  • ci(Makefile): add build_mdi_js job nc-config#34

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[tanyaka]

Review OK.

[github-actions]

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