Add Hermes Agent memory provider integration

[starboyate]

Summary

• Add a native Hermes Agent memory provider integration under memind-integrations/hermes.
• Support automatic Memind recall, conversation ingestion, pre-compression context injection, memory write ingestion, and the memind_retrieve / memind_extract_text Hermes-native tools.
• Add Hermes-specific configuration, identity resolution, formatting, documentation, and a root README pointer.

Test Plan

• PYTHONPATH=memind-integrations/hermes:memind-clients/python/src UV_CACHE_DIR=.uv-cache uv run --python /opt/homebrew/bin/python3.12 --with httpx --with pydantic --with typing-extensions python -m unittest discover -s memind-integrations/hermes/tests -v
• PYTHONPATH=memind-integrations/claude-code python3 -m unittest discover -s memind-integrations/claude-code/tests -v
• PYTHONPATH=memind-integrations/codex /opt/homebrew/bin/python3.12 -m unittest discover -s memind-integrations/codex/tests -v
• git diff --cached --check