Activate/Deactivate workflow and Discard Draft (#7022)

## Setup

This PR can be tested only if some feature flags have specific values:

- `IsWorkflowEnabled` equals `true`
- `IsQueryRunnerTwentyORMEnabled` equals `false`

These feature flags weren't committed to don't break other branches.

## What this PR brings

- Display buttons to activate and deactivate a workflow version and a
button to discard the current draft version. I also scaffolded a "Test"
button, which doesn't do anything for now.
- Wired the activate, deactivate and discard draft buttons to the
backend.
- Made it possible to "edit" active and deactivated versions by
automatically creating a new draft version when the user tries to edit
the version.
- Hide the "Discard Draft", button if the current version is not a draft
or is the first version ever created.
- On the backend, don't consider discarded drafts when checking if a new
draft version can be created.
- On the backend, disallow deleting the first created workflow version.
Otherwise, we will end up with a blank canvas in the front end, and it
will be impossible to recover from it.
- On the backend, disallow running deactivation steps if the workflow
version is not currently active. Previously, we were throwing, which is
unnecessary as it's a valid case.

## Spotted bugs that we must dive into

### Duplicate workflow versions in Apollo cache


https://github.com/user-attachments/assets/7cfffd06-11e0-417a-8da0-f9a5f43b84e2

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/database/commands/data-seed-dev-workspace.command.ts

@@ -12,6 +12,7 @@ import {
   getDevSeedCompanyCustomFields,
   getDevSeedPeopleCustomFields,
 } from 'src/database/typeorm-seeds/metadata/fieldsMetadata';
+import { getDevSeedCustomObjects } from 'src/database/typeorm-seeds/metadata/objectsMetadata';
 import { seedCalendarChannels } from 'src/database/typeorm-seeds/workspace/calendar-channel';
 import { seedCalendarChannelEventAssociations } from 'src/database/typeorm-seeds/workspace/calendar-channel-event-association';
 import { seedCalendarEventParticipants } from 'src/database/typeorm-seeds/workspace/calendar-event-participants';
@@ -150,6 +151,7 @@ export class DataSeedWorkspaceCommand extends CommandRunner {
           objectMetadataMap[STANDARD_OBJECT_IDS.person],
           workspaceId,
         );
+        await this.seedCustomObjects(workspaceId, dataSourceMetadata.id);
 
         await workspaceDataSource.transaction(
           async (entityManager: EntityManager) => {
@@ -282,4 +284,15 @@ export class DataSeedWorkspaceCommand extends CommandRunner {
       });
     }
   }
+
+  async seedCustomObjects(workspaceId: string, dataSourceId: string) {
+    const devSeedCustomObjects = getDevSeedCustomObjects(
+      workspaceId,
+      dataSourceId,
+    );
+
+    for (const customObject of devSeedCustomObjects) {
+      await this.objectMetadataService.createOne(customObject);
+    }
+  }
 }