[UI] Empty states for the main tables

[rnetuka]

Empty table state according to Carbon patterns:
https://carbondesignsystem.com/patterns/empty-states-pattern/

Implemented as a reusable component.

Capabilities/Targets doesn't have any text since there is currently no Add/Edit feature for these.

NamespaceTable doesn't have it since there will be always at least public and default namespaces.

Summary by Sourcery

Add reusable empty state component for main admin tables when no data is available.

New Features:

• Introduce a shared TableEmptyState component for rendering empty table content following Carbon empty state patterns.
• Display contextual empty state messaging in Prompts, Forwards, Resources, Targets, and Tools tables when they have no rows.

Enhancements:

• Standardize empty table presentation across multiple admin pages for a more consistent user experience.

[sourcery-ai]

Reviewer's Guide

Implements a reusable Carbon-style TableEmptyState component and integrates it across key admin tables (Prompts, Forwards, Resources, Targets, Tools) to show consistent empty-state messaging when there is no data.

Flow diagram for table empty-state rendering logic

flowchart TD
  A[Render table body] --> B{Has rows?}
  B -- Yes --> C[Render data rows]
  B -- No --> D[Render TableEmptyState]
  D --> E[TableRow with single TableCell]
  E --> F[Stack with title and body text]

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File-Level Changes

Change	Details	Files
Introduce a reusable Carbon-based empty table state component.	Create TableEmptyState React component that renders a full-width TableRow/TableCell with configurable title/body text. Use Carbon Stack for vertical spacing and alignment, with inline styles for padding and Carbon text tokens for colors. Expose colSpan prop so the component can span the correct number of columns for different tables.	apps/ui/admin/src/Pages/EmptyTableState.tsx
Wire the empty-state component into Prompts, Forwards, Resources, Targets, and Tools tables.	Import TableEmptyState into each table file and render it conditionally when the corresponding dataset length is zero. Pass colSpan based on headers length (or headers length + 1 where an extra column exists) to keep the row layout correct. Provide context-specific titles/bodies for Prompts, Forwards, Resources, and Tools, while leaving Targets’ text empty per current product requirements. Refactor PromptsTable DataTable render prop to use a block body so the empty-state JSX can be appended after the mapped rows.	apps/ui/admin/src/Pages/Prompts/PromptsTable.tsx apps/ui/admin/src/Pages/Forwards/ForwardsTable.tsx apps/ui/admin/src/Pages/Resources/ResourcesTable.tsx apps/ui/admin/src/Pages/Targets/TargetsTable.tsx apps/ui/admin/src/Pages/Tools/ToolsTable.tsx

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[sourcery-ai]

Hey - I've found 1 issue, and left some high level feedback:

• In TableEmptyState, alignItems: "left" and justifyContent: "left" are not valid flex alignment values; consider using "flex-start" for both to ensure predictable layout across browsers.
• Instead of requiring title and body strings (and passing empty strings for Targets), consider making these props optional and conditionally rendering the <h4> and <p> elements when values are provided.
• For the empty-state checks (e.g., fetchedData.length == 0), prefer strict equality (===) to avoid unintended truthiness quirks and stay consistent with typical TypeScript/JavaScript style.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- In `TableEmptyState`, `alignItems: "left"` and `justifyContent: "left"` are not valid flex alignment values; consider using `"flex-start"` for both to ensure predictable layout across browsers.
- Instead of requiring `title` and `body` strings (and passing empty strings for Targets), consider making these props optional and conditionally rendering the `<h4>` and `<p>` elements when values are provided.
- For the empty-state checks (e.g., `fetchedData.length == 0`), prefer strict equality (`===`) to avoid unintended truthiness quirks and stay consistent with typical TypeScript/JavaScript style.

## Individual Comments

### Comment 1
<location path="apps/ui/admin/src/Pages/EmptyTableState.tsx" line_range="15-19" />
<code_context>
+  return (
+    <TableRow>
+      <TableCell colSpan={colSpan}>
+        <Stack gap={6} style={{
+          alignItems: "left",
+          justifyContent: "left",
+          padding: "4rem 0",
+          color: "var(--cds-text-secondary)"
+        }}>
+          <div style={{ textAlign: "left", paddingLeft: "4rem" }}>
</code_context>
<issue_to_address>
**issue (bug_risk):** The `alignItems` and `justifyContent` values of `"left"` are not valid flexbox values.

These properties should use valid flexbox values like `flex-start` or `center`. `
</issue_to_address>

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[sourcery-ai]

issue (bug_risk): The alignItems and justifyContent values of "left" are not valid flexbox values.

These properties should use valid flexbox values like flex-start or center. `