Add default ra dec unit (degree or hms)

...cone-search-config/cone-search-config-form.component.html

...s/cone-search-config/cone-search-config-form.component.ts

.../instance/cone-search/components/cone-search.component.ts

.../src/app/instance/cone-search/components/dec.component.ts

...t/src/app/instance/cone-search/components/ra.component.ts

...search/components/criteria/cone-search-tab.component.html

client/src/app/metamodel/models/cone-search-config.model.ts

conf-dev/create-db.sh

server/doctrine-proxy/__CG__AppEntityConeSearchConfig.php

server/src/Action/ConeSearchConfigAction.php

server/src/Entity/ConeSearchConfig.php