Enregistrement et affichage d'un flux d'évènements

- Ajout d'une nouvelle entité "Event"
- Affichage d'une "timeline" sur le tableau de bord
- Création semi-automatique des évènements lors des modifications par
  les utilisateurs

client/src/components/DecisionSupportFileLink.tsx

@@ -0,0 +1,25 @@
+import React, { FunctionComponent } from "react";
+import { Link } from "react-router-dom";
+import { useWorkgroups } from "../gql/queries/workgroups";
+import { useDecisionSupportFiles } from "../gql/queries/dsf";
+
+export interface DecisioSupportFileLinkProps {
+  decisionSupportFileId: number
+}
+
+export const DecisioSupportFileLink: FunctionComponent<DecisioSupportFileLinkProps> = ({ decisionSupportFileId }) => {
+  const { decisionSupportFiles } = useDecisionSupportFiles({
+    fetchPolicy: "cache-first",
+    variables: {
+      filter: {
+        ids: [decisionSupportFileId]
+      }
+    }
+  });
+
+  const title = decisionSupportFiles.length > 0 ? decisionSupportFiles[0].title : `#${decisionSupportFileId}`;
+
+  return (
+    <Link to={`/decisions/${decisionSupportFileId}`}>{title}</Link>
+  );
+};