🔧 Add site/ to .gitignore (mkdocs build output)

site/foundation/helpers/onboarding-flow-diagram.mermaid

@@ -1,18 +0,0 @@
-```mermaid
-flowchart TD
-  A[User visits DAARION.city] --> B{Login method}
-  B -->|Email OTP| C[Create/Activate DAIS Identity]
-  B -->|Magic Link| C
-  B -->|Web3 Wallet (SIWE)| C
-  C --> D[Create Agent (home_microdao = DAARION)]
-  D --> E[Agent Console]
-  E --> F{Become Orchestrator?}
-  F -->|Yes| G[Check Access Conditions (wallet, tokens)]
-  G -->|Pass| H[agent.promoted_to_orchestrator]
-  H --> I[MicroDAO Creation Wizard]
-  I --> J[microdao.created]
-  J --> K[NODE REGISTRATION]
-  K --> L[node.registered]
-  L --> M[MicroDAO Operational]
-```
-