Mock endpoint for graphical data format

[eoye]

Pull requests practices for the SSI team

Aim of the PR

This PR fixes AB#218925.

The aim of this PR is to mock/stub endpoint for getting graphical data format for P&IDs.

Implementation

This has been done by mocking an endpoint for getting the graphical data format for a P&ID by ID, which now return the example json file we have made. An endpoint for getting all P&IDs has also been stubbed.

Type of change

• Bug fix
• New feature
• Breaking change
• This change requires a documentation update

If the changes impact any dependent services then provide details.

How Has This Been Tested?

This has been tested by running the project and testing out the endpoint in swagger.

Additional Changes

I refactored the existing minimal API by splitting it up in it's own folders and files.

[markus-ap]

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[daghovland]

Veldig bra med refaktorerering, men det var litt vanskelig å se hva som var nytt og hva som var flyttet. Jeg har noen innspill/kommetnarer, men vet ikke om de er riktige (eller viktige)