feat: sync content definitions from core repo

Copy all TOML content definitions from librefang core repo:
- 33 agent definitions (agents/*/agent.toml)
- 14 hand definitions with docs (hands/*/HAND.toml + SKILL.md)
- 25 integration templates (integrations/*.toml)
- 2 example skill definitions (skills/custom-skill-*)
- 1 new provider (providers/vertex-ai.toml)

Part of the framework-vs-content registry split (RFC v0.7).

integrations/azure-mcp.toml

@@ -0,0 +1,49 @@
+id = "azure-mcp"
+name = "Microsoft Azure"
+description = "Manage Azure resources including VMs, Storage, and App Services through the MCP server"
+category = "cloud"
+icon = "🔷"
+tags = ["cloud", "microsoft", "infrastructure", "azure", "devops", "enterprise"]
+
+[transport]
+type = "stdio"
+command = "npx"
+args = ["-y", "@azure/mcp@latest", "server", "start"]
+
+[[required_env]]
+name = "AZURE_SUBSCRIPTION_ID"
+label = "Azure Subscription ID"
+help = "Your Azure subscription ID (found in the Azure Portal under Subscriptions)"
+is_secret = false
+get_url = "https://portal.azure.com/#blade/Microsoft_Azure_Billing/SubscriptionsBlade"
+
+[[required_env]]
+name = "AZURE_TENANT_ID"
+label = "Azure Tenant ID"
+help = "Your Azure Active Directory tenant ID"
+is_secret = false
+get_url = "https://portal.azure.com/#blade/Microsoft_AAD_IAM/ActiveDirectoryMenuBlade/Overview"
+
+[[required_env]]
+name = "AZURE_CLIENT_ID"
+label = "Azure Client ID"
+help = "The application (client) ID of your Azure AD app registration"
+is_secret = false
+get_url = "https://portal.azure.com/#blade/Microsoft_AAD_RegisteredApps/ApplicationsListBlade"
+
+[[required_env]]
+name = "AZURE_CLIENT_SECRET"
+label = "Azure Client Secret"
+help = "A client secret generated for your Azure AD app registration"
+is_secret = true
+get_url = "https://portal.azure.com/#blade/Microsoft_AAD_RegisteredApps/ApplicationsListBlade"
+
+[health_check]
+interval_secs = 60
+unhealthy_threshold = 3
+
+setup_instructions = """
+1. In the Azure Portal, register an application under Azure Active Directory > App registrations and note the Client ID and Tenant ID.
+2. Create a client secret under Certificates & Secrets for the registered application.
+3. Assign the appropriate RBAC roles to the application on your subscription, then paste all four values into the fields above.
+"""