feat: add managed tool gateway and Nous subscription support

- add managed modal and gateway-backed tool integrations\n- improve CLI setup, auth, and configuration for subscriber flows\n- expand tests and docs for managed tool support

.env.example

@@ -69,6 +69,17 @@ OPENCODE_GO_API_KEY=
 # Get at: https://parallel.ai
 PARALLEL_API_KEY=
 
+# Tool-gateway config (Nous Subscribers only; preferred when available)
+# Uses your Nous Subscriber OAuth access token from the Hermes auth store by default.
+# Defaults to the Nous production gateway. Override for local dev.
+#
+# Derive vendor gateway URLs from a shared domain suffix:
+# TOOL_GATEWAY_DOMAIN=nousresearch.com
+# TOOL_GATEWAY_SCHEME=https
+#
+# Override the subscriber token (defaults to ~/.hermes/auth.json):
+# TOOL_GATEWAY_USER_TOKEN=
+
 # Firecrawl API Key - Web search, extract, and crawl
 # Get at: https://firecrawl.dev/
 FIRECRAWL_API_KEY=