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-setup.md

@@ -0,0 +1,45 @@
+---
+description: Interactive setup wizard for viz-platform plugin
+---
+
+# Viz-Platform Setup Wizard
+
+## Visual Output
+
+```
++------------------------------------------------------------------+
+|  VIZ-PLATFORM - Setup Wizard                                     |
++------------------------------------------------------------------+
+```
+
+Sets up viz-platform with DMC validation and theming.
+
+**Note:** Uses Bash/Read/Write tools - NOT MCP tools. Restart session after setup.
+
+## Phase 1: Environment Validation
+
+Check Python 3.10+ and DMC installation:
+```bash
+python3 --version
+python3 -c "import dash_mantine_components as dmc; print(dmc.__version__)"
+```
+
+## Phase 2: MCP Server Setup
+
+Locate and create venv if missing:
+```bash
+cd /path/to/mcp-servers/viz-platform && python3 -m venv .venv && .venv/bin/pip install -r requirements.txt
+```
+
+## Phase 3: Theme Preferences (Optional)
+
+Ask user about color scheme and primary color. Save to `~/.config/claude/viz-platform.env`.
+
+## Phase 4: Validation
+
+Verify MCP server loads, display summary, prompt session restart.
+
+## Related Commands
+
+- `/component {name}` - Inspect component props
+- `/chart {type}` - Create a chart