refactor: consolidate MCP integration to unified gateway

**Changes**:
- Remove individual MCP server docs (superclaude/mcp/*.md)
- Remove MCP server configs (superclaude/mcp/configs/*.json)
- Delete MCP docs component (setup/components/mcp_docs.py)
- Simplify installer (setup/core/installer.py)
- Update components for unified gateway approach

**Rationale**:
- Unified gateway (airis-mcp-gateway) provides all MCP servers
- Individual docs/configs no longer needed (managed centrally)
- Reduces maintenance burden and file count
- Simplifies installation process

**Files Removed**: 17 MCP files (docs + configs)
**Installer Changes**: Removed legacy MCP installation logic

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

setup/cli/commands/uninstall.py

@@ -79,14 +79,6 @@ def verify_superclaude_file(file_path: Path, component: str) -> bool:
                 "MODE_Task_Management.md",
                 "MODE_Token_Efficiency.md",
             ],
-            "mcp_docs": [
-                "MCP_Context7.md",
-                "MCP_Sequential.md",
-                "MCP_Magic.md",
-                "MCP_Playwright.md",
-                "MCP_Morphllm.md",
-                "MCP_Serena.md",
-            ],
         }
 
         # For commands component, verify it's in the sc/ subdirectory
@@ -427,8 +419,7 @@ def _custom_component_selection(
         "core": "Core Framework Files (CLAUDE.md, FLAGS.md, PRINCIPLES.md, etc.)",
         "commands": "superclaude Commands (commands/sc/*.md)",
         "agents": "Specialized Agents (agents/*.md)",
-        "mcp": "MCP Server Configurations",
-        "mcp_docs": "MCP Documentation",
+        "mcp": "MCP Server Configurations (airis-mcp-gateway)",
         "modes": "superclaude Modes",
     }
 
@@ -568,9 +559,8 @@ def display_component_details(component: str, info: Dict[str, Any]) -> Dict[str,
         },
         "mcp": {
             "files": "MCP server configurations in .claude.json",
-            "description": "MCP server configurations",
+            "description": "MCP server configurations (airis-mcp-gateway)",
         },
-        "mcp_docs": {"files": "MCP/*.md", "description": "MCP documentation files"},
         "modes": {"files": "MODE_*.md", "description": "superclaude operational modes"},
     }