docs: fix Hermes integration - use mcp_servers instead of skills config

[richardiitse]

Summary

Fixes the Hermes Agent integration guide which documented an incorrect configuration approach.

Problem

The HERMES_MEMPALACE_GUIDE.md documented a skills: configuration method, but Hermes Agent only exposes tools via:

1. SKILL.md (YAML frontmatter + Markdown) — properly parsed, tools exposed
2. skill.py (Python class) — loaded as metadata only, not exposed as tools

The documented skills: approach falls into category 2, meaning no mempalace_* tools would actually appear in the agent's tool list despite the skill being loaded.

Solution

1. New integrations/hermes/SKILL.md — MCP-based skill file in the Hermes-integrations pattern, documents all 33 available tools and usage protocol
2. Rewritten HERMES_MEMPALACE_GUIDE.md — replaces skills: config with correct mcp_servers: configuration, full tool reference, and practical usage examples

Changes

• integrations/hermes/SKILL.md (new) — Hermes skill file for MCP-based integration
• HERMES_MEMPALACE_GUIDE.md (rewritten) — corrected integration instructions + full tool reference

Testing

The fix was validated on a live Hermes + MemPalace installation:

• MCP server starts correctly
• All 33 mempalace_* tools are discovered and available
• Semantic search, knowledge graph, and drawer operations all functional

Closes #953

[igorls]

Thanks for the Hermes docs contribution. I reviewed this along with #1684 during the agent-support pass.

The correction from skills config to mcp_servers is useful, but this doc is now stale against the current project:

• The MCP tool count and examples need to match the current reference docs.
• We should avoid a root-level HERMES_MEMPALACE_GUIDE.md; this should live under integrations/hermes/ or website/guide/ with the rest of the integration docs.
• The setup should use the current recommended command/config style and mention local-first/privacy constraints precisely.
• If feat(integrations): Hermes memory provider (revives #3, ABC-current + dim-fix) #1684 is revived, this guide should be folded into that integration work rather than landing as a separate parallel Hermes doc.

Happy to merge a refreshed Hermes guide once it is aligned with the current MCP surface and location conventions.