Create route for Opinions

create OpinionRepository
create OpinionVoter
create OpinionChoiceRef
create extention String.toUUID() and List<String>.toUUID()
create OpinionAggregation
create interface RequestBuilderWithCreator for create entity by request
rename opinion_list to opinion_choice
create sql function find_citizen_opinions
fix sql function find_citizen_opinions_by_target_id
fix sql funciton find_opinion_choices

src/main/kotlin/fr/dcproject/entity/Opinionable.kt

@@ -1,5 +1,11 @@
 package fr.dcproject.entity
 
+import fr.postgresjson.entity.EntityI
+
+class OpinionAggregation(
+    override val entries: Set<Map.Entry<String, Int>> = emptySet()
+) : AbstractMap<String, Int>(), EntityI
+
 interface Opinionable {
     val opinions: MutableMap<String, Int>
 }