feat: add documentation website (Docusaurus)

- 25 documentation pages covering Getting Started, User Guide, Developer Guide, and Reference
- Docusaurus with custom amber/gold theme matching the landing page branding
- GitHub Actions workflow to deploy landing page + docs to GitHub Pages
- Landing page at root, docs at /docs/ on hermes-agent.nousresearch.com
- Content extracted and restructured from existing repo docs (README, AGENTS.md, CONTRIBUTING.md, docs/)
- Auto-deploy on push to main when website/ or landingpage/ changes

website/docs/user-guide/features/delegation.md

@@ -0,0 +1,60 @@
+---
+sidebar_position: 7
+title: "Subagent Delegation"
+description: "Spawn isolated child agents for parallel workstreams with delegate_task"
+---
+
+# Subagent Delegation
+
+The `delegate_task` tool spawns child AIAgent instances with isolated context, restricted toolsets, and their own terminal sessions. Each child gets a fresh conversation and works independently — only its final summary enters the parent's context.
+
+## Single Task
+
+```python
+delegate_task(
+    goal="Debug why tests fail",
+    context="Error: assertion in test_foo.py line 42",
+    toolsets=["terminal", "file"]
+)
+```
+
+## Parallel Batch
+
+Up to 3 concurrent subagents:
+
+```python
+delegate_task(tasks=[
+    {"goal": "Research topic A", "toolsets": ["web"]},
+    {"goal": "Research topic B", "toolsets": ["web"]},
+    {"goal": "Fix the build", "toolsets": ["terminal", "file"]}
+])
+```
+
+## Key Properties
+
+- Each subagent gets its **own terminal session** (separate from the parent)
+- **Depth limit of 2** — no grandchildren
+- Subagents **cannot** call: `delegate_task`, `clarify`, `memory`, `send_message`, `execute_code`
+- **Interrupt propagation** — interrupting the parent interrupts all active children
+- Only the final summary enters the parent's context, keeping token usage efficient
+
+## Configuration
+
+```yaml
+# In ~/.hermes/config.yaml
+delegation:
+  max_iterations: 50                        # Max turns per child (default: 50)
+  default_toolsets: ["terminal", "file", "web"]  # Default toolsets
+```
+
+## When to Use Delegation
+
+Delegation is most useful when:
+
+- You have **independent workstreams** that can run in parallel
+- A subtask needs a **clean context** (e.g., debugging a long error trace without polluting the main conversation)
+- You want to **fan out** research across multiple topics and collect summaries
+
+:::tip
+The agent handles delegation automatically based on the task complexity. You don't need to explicitly ask it to delegate — it will do so when it makes sense.
+:::