fix: display of vector dataSources in map-cesium

PR Checklist

Please check if your PR fulfills the following requirements:

[x] The commit message follows our guidelines: https://github.com/dlr-eoc/ukis-frontend-libraries/blob/main/CONTRIBUTING.md#-commit-message-guidelines
[x] Tests for the changes have been added (for bug fixes / features)
[x] Docs have been added / updated (for bug fixes / features)
[x] The Project is building and passes all tests without errors

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

At the moment DataSources like geoJSON or KML are not displayed correctly on the cesium globe. There seems to be some interference with the handling of primitive datasets like tilesets.

Issue Number: #197

What is the new behavior?

Vector DataSources are displayed correctly. The issue was fixed by seperating the handling of cesium primitives and datasources. Cesium dependencies were updated in the process. Vector DataSources were added to the demo-maps cesium example.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

Affects map-cesium and demo-maps

dlr-eoc / ukis-frontend-libraries