feat: Create a datalink from Galaxy

Tasks done in this MR:

• Update Vuetify
• Add a method in NodeStore to create the Datalink of a node
• Add the datatable (server side) to display all the datalinks created in nid.vue
• Create a component NewDatalink that handles:
  • Create the connection or connector selection step
  • Create a modal integrating a stepper for adding a new datalink
  • Create dataobject selection step
• Create a modal to display the contents of a datalink
• create a store for the connection