Add Hermes Agent context pack helper

[GhaythBenAbid]

Summary

Adds a small Hermes Agent integration layer for Gitingest:

• scripts/hermes_ingest.py: creates a Hermes-friendly context pack under ~/.hermes/repo-context/<name>/
• docs/hermes.md: documents the Hermes workflow and safety notes
• AGENTS.md: gives coding agents lightweight repo-specific instructions

Why

Hermes users often need repository context without pasting a large digest directly into chat. This wrapper saves a reusable context pack (context.md, prompt.md, manifest.json) that Hermes can read from disk while keeping generated artifacts out of git.

Verification

python -m py_compile scripts/hermes_ingest.py
python scripts/hermes_ingest.py /home/ghayth/ai-parliament --name ai-parliament-smoke --include '*.py,*.md,LICENSE' --exclude 'assets/*' --max-size 50000
python -m pytest tests/test_cli.py tests/test_ingestion.py -q

Result: 11 passed.