Ajout dijkstra

app/build.gradle.kts

app/src/main/AndroidManifest.xml

...java/com/example/buildingvisitor/Data/AccessDijkstra.java

.../main/java/com/example/buildingvisitor/Data/Building.java

...ain/java/com/example/buildingvisitor/VisitorActivity.java

...n/java/com/example/buildingvisitor/chooseDestination.java

...rc/main/java/com/example/buildingvisitor/chooseStart.java

app/src/main/res/layout/activity_choose_destination.xml

app/src/main/res/layout/activity_find_file.xml

app/src/main/res/layout/activity_main.xml

app/src/main/res/layout/activity_visitor.xml