feat: link commits, branches and pull requests to tickets

A project can turn on a webhook for GitHub, Gitea or GitLab. Pushes and
pull or merge requests that name a ticket key show on that ticket under
Desarrollo, with the state of each pull request; the secret is shown and
rotated from the project settings.

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

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

@@ -16,6 +16,7 @@ import {
 } from '@angular/core';
 import { NgTemplateOutlet } from '@angular/common';
 import { PiIconComponent, PiNoteComponent } from '@pi/ui';
+import { GitIntegrationComponent } from '../ui/git-integration';
 import { ProjectFacade } from '@task-stream/web/tracker/application';
 import {
   ProjectSettings,
@@ -51,6 +52,7 @@ function idFrom(name: string): string {
   selector: 'ts-settings-page',
   changeDetection: ChangeDetectionStrategy.OnPush,
   imports: [
+    GitIntegrationComponent,
     CdkDropList,
     CdkDrag,
     CdkDragHandle,
@@ -461,6 +463,13 @@ function idFrom(name: string): string {
         }
       </form>
 
+      @if (facade.canManage() && facade.project(); as project) {
+        <ts-git-integration
+          [projectId]="project.id"
+          [projectKey]="project.key"
+        />
+      }
+
       @if (facade.isOwner() && facade.project(); as project) {
         <section
           class="ts-panel ts-block ts-danger"