♻️ Refactor icon picker (#724)

src/tools/server/images/abstract-icons-repository.ts

@@ -0,0 +1,32 @@
+export abstract class AbstractIconRepository {
+  constructor(readonly copyright?: string) {}
+
+  async fetch(): Promise<NormalizedIconRepositoryResult> {
+    try {
+      return await this.fetchInternally();
+    } catch (err) {
+      return {
+        success: false,
+        count: 0,
+        entries: [],
+        name: '',
+        copyright: this.copyright,
+      };
+    }
+  }
+  protected abstract fetchInternally(): Promise<NormalizedIconRepositoryResult>;
+}
+
+export type NormalizedIconRepositoryResult = {
+  name: string;
+  success: boolean;
+  count: number;
+  copyright: string | undefined;
+  entries: NormalizedIcon[];
+};
+
+export type NormalizedIcon = {
+  url: string;
+  name: string;
+  size: number;
+};