feat: ES-162 add welcome screen to select scan root#97

matiasdaloia merged 3 commits intomainscanoss/scanoss.cc:mainfrom

feature/mdaloia/ES-162-SCANOSS-Code-Compare-Add-UI-for-selecting-the-scan-root-if-the-path-is-scanoss/scanoss.cc:feature/mdaloia/ES-162-SCANOSS-Code-Compare-Add-UI-for-selecting-the-scan-root-if-the-path-is-Copy head branch name to clipboard