Add RPI workflow - Research, Plan, Implement

- Add generic RPI workflow with 3 commands: /rpi:research, /rpi:plan, /rpi:implement
- Include 8 specialized agents for different phases
- Add professional SVG diagram for workflow visualization
- Update README with link to RPI workflow

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

.claude/settings.json

@@ -11,7 +11,8 @@
       "mcp__ide__*",
       "mcp__chrome-devtools__*",
       "mcp__claude-in-chrome__*",
-      "mcp__playwright__*"
+      "mcp__playwright__*",
+      "mcp__reddit-mcp-server__get_post_details"
     ],
     "deny": [],
     "ask": []