feat: new startup process setup script

feat: hide-ui and color-gradient features integration

Merge pull request #2 from gomesgustavoo/feature/color-gradient

feat: gray gradient slide button

docs: update documentation and improve old OS compatibility

documentation: add new dicom features

fix: ensure segmentation masks persist when changing NiiVue layout

Merge pull request #1 from gomesgustavoo/feature/dicom-support

fix: orientation problems on rtstruct.dcm file

feat: add dicom support

bug fixes and improved manual drawing tools

backend model path improve and documentation gets better

removed static path model definition

add demo image

documentation improves again