refactor: rename command files for namespace consistency

BREAKING CHANGE: All generic command names now prefixed with plugin namespace.
See CHANGELOG.md v7.0.0 for complete rename map.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/viz-platform/commands/viz-dashboard.md

@@ -0,0 +1,41 @@
+---
+description: Create a dashboard layout with the layout-builder agent
+---
+
+# Create Dashboard
+
+## Skills to Load
+- skills/mcp-tools-reference.md
+- skills/layout-templates.md
+
+## Visual Output
+
+```
++------------------------------------------------------------------+
+|  VIZ-PLATFORM - Dashboard Builder                                |
++------------------------------------------------------------------+
+```
+
+Create a dashboard layout with filters, grids, and sections.
+
+## Usage
+
+```
+/dashboard {template}
+```
+
+## Arguments
+
+- `template` (optional): basic, sidebar, tabs, split
+
+## Agent Mapping
+
+Activates **layout-builder** agent which orchestrates:
+- `layout_create` - Create base layout structure
+- `layout_add_filter` - Add filter components
+- `layout_set_grid` - Configure responsive grid
+
+## Related Commands
+
+- `/breakpoints {layout}` - Configure responsive breakpoints
+- `/chart {type}` - Add charts to layout