feat(cli): add Markdown and syntax-highlighted code block rendering

[pcomte3]

Summary

• Add real-time Markdown rendering for LLM responses in the Hermes CLI, supporting both streaming and non-streaming display modes
• Streaming uses a stateful line-by-line processor (MarkdownStreamProcessor) with regex-based ANSI transforms for inline formatting and per-line Pygments highlighting for fenced code blocks
• Non-streaming uses Rich's Markdown class inside the existing Panel for full AST-based rendering
• Configurable via display.markdown (default: true) and toggleable at runtime with /markdown (alias /md)

Features

• Inline formatting: bold, italic, bold+italic, strikethrough, inline code, headers (h1–h4), blockquotes, links, ordered/unordered lists, horizontal rules
• Fenced code blocks: syntax-highlighted with Pygments, rendered with box-drawing decorators (┌───python───, └───)
• Pipe tables: buffered and rendered with box-drawing borders, aligned columns (wcwidth-aware for emoji/CJK), bold headers, and mid-border separators
• Skin-aware: Pygments theme auto-selected based on active skin (monokai, nord, friendly_grayscale), overridable via display.code_theme or per-skin code_theme YAML field
• LLM fence handling: ```markdown / ```md fences transparently skipped (common LLM behavior of wrapping entire responses)
• Escaped characters: \*, \_, \~, \` correctly preserved as literal text

Files changed

File	Change
hermes_cli/markdown_stream.py	New — core module (~500 lines)
cli.py	Streaming + non-streaming integration, /markdown command, theme resolver
hermes_cli/config.py	display.markdown and display.code_theme defaults
hermes_cli/skin_engine.py	code_theme field on SkinConfig
hermes_cli/commands.py	/markdown command registration
tests/test_markdown_stream.py	New — 52 tests covering all transforms, code blocks, tables, fences, edge cases

Test plan

• pytest tests/test_markdown_stream.py — 52 tests pass
• Manual: streaming mode — ask agent to write Python code, verify syntax highlighting streams live
• Manual: non-streaming mode — verify Rich Markdown renders in Panel
• Manual: /markdown toggle — flip off, verify raw text; flip on, verify formatted
• Manual: table with emoji — verify column alignment with double-width characters
• Manual: LLM wrapping response in ```markdown ``` — verify content renders as markdown, not code

[pcomte3]

@teknium1 This PR adds Markdown rendering support to the Hermes CLI — syntax-highlighted code blocks, inline formatting (bold/italic/headers/lists/etc.), and formatted pipe tables with box-drawing borders. Works for both streaming and non-streaming modes with no new dependencies. Toggleable via /markdown command or display.markdown in config. Would love your feedback!

[pcomte3]

Update: 2 additional commits pushed.

• Removed hardcoded 30s timeout in flush_memories — now reads from auxiliary.flush_memories.timeout in config (fixes repeated disconnects on local LLM servers)
• Hardened markdown renderer: h5/h6 support, stricter fence detection, inline code protection from bold/italic corruption, unmatched markers pass through safely. 59 tests total.