refactor: Webhooks (#12487)

Closes #12303

### What’s Changed
- Replace auto‐save with explicit Save / Cancel
Webhook forms now use manual “Save” and “Cancel” buttons instead of the
old debounced auto‐save/update.

- Separate “New” and “Detail” routes
Two dedicated paths `/settings/webhooks/new` for creation and
/`settings/webhooks/:webhookId` for editing, making the UX clearer.

- URL hint & normalization
If a user omits the http(s):// scheme, we display a “Will be saved as
https://…” hint and automatically default to HTTPS.

- Centralized validation with Zod
Introduced a `webhookFormSchema` for client‐side URL, operations, and
secret validation.

- Storybook coverage
Added stories for both “New Webhook” and “Webhook Detail”

- Unit tests
Added tests for the new `useWebhookForm` hook

packages/twenty-server/src/modules/webhook/jobs/call-webhook.job.ts

@@ -3,6 +3,8 @@ import { Logger } from '@nestjs/common';
 
 import crypto from 'crypto';
 
+import { getAbsoluteUrl } from 'twenty-shared/utils';
+
 import { AuditService } from 'src/engine/core-modules/audit/services/audit.service';
 import { WEBHOOK_RESPONSE_EVENT } from 'src/engine/core-modules/audit/utils/events/workspace-event/webhook/webhook-response';
 import { Process } from 'src/engine/core-modules/message-queue/decorators/process.decorator';
@@ -72,7 +74,7 @@ export class CallWebhookJob {
       }
 
       const response = await this.httpService.axiosRef.post(
-        data.targetUrl,
+        getAbsoluteUrl(data.targetUrl),
         payloadWithoutSecret,
         { headers },
       );