Refactor user management in Ansible playbooks to standardize on keeper_user

- Updated user addition tasks across multiple playbooks (mcp_switchboard, mcpo, neo4j, neo4j_mcp, openwebui, postgresql, rabbitmq, searxng, smtp4dev) to replace references to ansible_user and remote_user with keeper_user.
- Modified PostgreSQL deployment to create directories and manage files under keeper_user's home.
- Enhanced documentation to clarify account taxonomy and usage of keeper_user in playbooks.
- Introduced new deployment for Agent S, including environment setup, desktop environment installation, XRDP configuration, and accessibility support.
- Added staging playbook for preparing release tarballs from local repositories.
- Created templates for XRDP configuration and environment activation scripts.
- Removed obsolete sunwait documentation.

ansible/agent_s/agent_s_env.j2

@@ -0,0 +1,32 @@
+# Agent S Environment Configuration
+# Source this file to activate the Agent S environment
+# Usage: source ~/.agent_s_env
+
+# Activate Python virtual environment
+if [ -f "{{ agent_s_venv }}/bin/activate" ]; then
+    source "{{ agent_s_venv }}/bin/activate"
+    echo "✓ Agent S Python environment activated"
+fi
+
+# Set Agent S paths
+export AGENT_S_HOME="{{ agent_s_repo }}"
+export PATH="{{ agent_s_venv }}/bin:$PATH"
+
+# Display setup
+export DISPLAY=:10.0
+
+# Required API Key Vars:
+export HF_TOKEN=0000
+export OPENAI_API_KEY=0000
+
+# Helpful aliases
+alias agent_s_cd='cd {{ agent_s_repo }}'
+alias agent_s_start='cd {{ agent_s_repo }} && source {{ agent_s_venv }}/bin/activate'
+
+echo "Agent S Environment Ready"
+echo "  Virtual Env: {{ agent_s_venv }}"
+echo "  Repository:  {{ agent_s_repo }}"
+echo ""
+echo "Quick commands:"
+echo "  agent_s_cd       - Change to Agent S directory"
+echo "  agent_s_start    - Activate environment and change to repo"