Migrate the assets of data store and source to Polypheny-DB

[malikrafsan]

Summary

In this pull request, we move the logos from stored at the Frontend (Polypheny-UI) to the Backend (Polypheny-DB). We also add the logo path/icon identifier on the response regarding Data Store and Data Source (/getSnapshot). By doing this, we can simplify the process of adding new Data Stores / Data Sources by storing the logos in Polypheny-DB sources together with the adapter implementation.

Fixes: #222

Changes

• Add adapterLogo attribute on AdapterProperties annotation interface
• Send adapterLogo attribute with existing adapter information
• Change Polypheny-UI logic regarding adapterLogo

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Related PRs

• Polypheny-DB: Move and Store the Data Source and Data Store Logos on Polypheny-DB

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Screenshots

• Asset files can be served by Polypheny-DB, under /public hosted path
  

• Polypheny-UI can access the Polypheny-DB static files and the Data Source and Data Store logos are shown successfully
  

[malikrafsan]

Hi @vogti I am sorry I think previous PR cannot be editted regarding the target branch. Therefore, I think we need to open a new PR. I would be more than happy to get your feedback, thank you so much!!

[datomo]

Thank you @malikrafsan, this looks good.
After updating the branch this should be good to go.

[malikrafsan]

Thank you so much for your review @datomo ! But I think we need to merge this MR first, as this UI MR is introducing breaking changes on the icon and it dependent to this DB MR

polypheny/Polypheny-DB#485