You should typically not bootstrap content using a spaces bootstrap - that is reserved for creating the initial state of a store like workspace://SpacesStore when Alfresco first starts up. For extensions / customisations you should primarily rely on ImporterModuleComponent.
The folder is created where you specified it - in your case in the "Data Dictionary" folder. The "Company Home" is the root folder you see when you access the "Repository" view in Share (aka "Repository" or "Documents" in the left-hand tree). All active content that is not some system content typically is located in the tree somewhere below Company Home.