Initial commit with basic CRUD functionality:

* GET all properties
* GET one property by id
* CREATE one property
* DELETE one property by id

src/main/java/de/iwomm/propify_api/repository/PropertyRepository.java

@@ -0,0 +1,11 @@
+package de.iwomm.propify_api.repository;
+
+import de.iwomm.propify_api.entity.Property;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+import java.util.UUID;
+
+public interface PropertyRepository extends JpaRepository<Property, UUID> {
+    public Optional<Property> findByName(String name);
+}