feat: import and export tickets as CSV

Every ticket of a project can be downloaded as CSV, and a CSV exported
from TaskStream or from Jira can be imported: types, statuses, priorities
and people are matched by id or name, the rest falls back with a warning,
and parents are rebuilt. The settings page previews an import before it
creates anything.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/web/tracker/presenters/src/lib/pages/settings.page.ts

@@ -18,6 +18,7 @@ import { NgTemplateOutlet } from '@angular/common';
 import { PiIconComponent, PiNoteComponent } from '@pi/ui';
 import { GitIntegrationComponent } from '../ui/git-integration';
 import { WebhooksComponent } from '../ui/webhooks';
+import { TransferComponent } from '../ui/transfer';
 import { ProjectFacade } from '@task-stream/web/tracker/application';
 import {
   ProjectSettings,
@@ -55,6 +56,7 @@ function idFrom(name: string): string {
   imports: [
     GitIntegrationComponent,
     WebhooksComponent,
+    TransferComponent,
     CdkDropList,
     CdkDrag,
     CdkDragHandle,
@@ -471,6 +473,7 @@ function idFrom(name: string): string {
           [projectKey]="project.key"
         />
         <ts-webhooks [projectId]="project.id" />
+        <ts-transfer [projectId]="project.id" [projectKey]="project.key" />
       }
 
       @if (facade.isOwner() && facade.project(); as project) {