feat: associate task icon with workspaces (#20834)

## Problem

Workspaces associated with tasks were not visually distinguishable in
the workspaces list view. Additionally, the list workspaces endpoint was
not returning the `task_id` field.

<img width="2784" height="864" alt="Screenshot 2025-11-20 at 10 32 22"
src="https://github.com/user-attachments/assets/60704f16-3c66-4553-9215-f10654998a38"
/>

## Changes

- Fix `ConvertWorkspaceRows` to include `task_id` in the list workspaces
endpoint response
- Add "Task" icon to the workspace list view for workspaces associated
with tasks
- Add test to verify `task_id` is correctly returned by the list
workspaces endpoint
- Add Storybook story to showcase the Task icon in the workspace list

Closes https://github.com/coder/coder/issues/20802

site/src/pages/WorkspacesPage/WorkspacesPageView.stories.tsx

@@ -2,6 +2,7 @@ import {
 	MockBuildInfo,
 	MockOrganization,
 	MockPendingProvisionerJob,
+	MockTaskWorkspace,
 	MockTemplate,
 	MockUserOwner,
 	MockWorkspace,
@@ -381,3 +382,18 @@ export const ShowOrganizations: Story = {
 		expect(accessibleTableCell).toBeDefined();
 	},
 };
+
+export const ShowWorkspaceTasks: Story = {
+	args: {
+		workspaces: [
+			{
+				...MockWorkspace,
+				name: "regular-user-workspace",
+			},
+			{
+				...MockTaskWorkspace,
+				name: "task-workspace",
+			},
+		],
+	},
+};

site/src/pages/WorkspacesPage/WorkspacesTable.tsx

@@ -17,6 +17,7 @@ import type {
 import { Avatar } from "components/Avatar/Avatar";
 import { AvatarData } from "components/Avatar/AvatarData";
 import { AvatarDataSkeleton } from "components/Avatar/AvatarDataSkeleton";
+import { Badge } from "components/Badge/Badge";
 import { Button } from "components/Button/Button";
 import { ConfirmDialog } from "components/Dialogs/ConfirmDialog/ConfirmDialog";
 import { ExternalImage } from "components/ExternalImage/ExternalImage";
@@ -207,6 +208,11 @@ export const WorkspacesTable: FC<WorkspacesTableProps> = ({
 												{workspace.outdated && (
 													<WorkspaceOutdatedTooltip workspace={workspace} />
 												)}
+												{workspace.task_id && (
+													<Badge size="xs" variant="default">
+														Task
+													</Badge>
+												)}
 											</Stack>
 										}
 										subtitle={