feat(FN-3787): add approval workflow and share blocks to reports plugin

Added an approval workflow to the reports plugin comprising a state machine (`approval.ts`), share blocks logic (`share-blocks.ts`), API routes for approvals, and two new dashboard panels (ReportApprovalPanel and ShareBlocksPanel), with corresponding tests; also updated the plugin README and added a

Fusion-Task-Id: FN-3787

plugins/fusion-plugin-reports/src/routes/__tests__/report-export-routes.test.ts

@@ -20,6 +20,8 @@ function report(overrides: Partial<Report> = {}): Report {
     publishedAt: null,
     archivedAt: null,
     failureReason: null,
+    approvalState: "not_required",
+    approvalHistory: [],
     draftMarkdown: null,
     renderedHtmlPath: null,
     renderedHtml: null,