feat: initial MCP server for printing markdown to Epson TM-m30

Single tool `print(markdown, title?, timestamp?, qr_urls?, cut?)`. Hand-rolled
line-by-line markdown parser translates headings/bold/code/lists/blockquotes/
HR/links to ESC/POS, then sends raw bytes via TCP to 192.168.0.184:9100.

Mirrors mcp-gemma4 layout (stdio server, single server.py, mcp package).

IDEA.md

@@ -0,0 +1,16 @@
+# IDEA.md — mcp-pos-print
+
+## What is this?
+
+An MCP server that exposes the Epson TM-m30 receipt printer (192.168.0.184) as a single tool to any Claude Code session. Claude calls `print` with a markdown string, the server translates markdown → ESC/POS and sends raw bytes over TCP to the printer.
+
+## Problem it solves
+
+When working with Claude on the homelab box, useful output sometimes belongs on paper — a code snippet to keep at the desk, a quick summary, a TODO list, a QR for a URL. Currently this requires writing a one-off Python script that imports `escpos` and `socket`. With this MCP, Claude just says "let me print that" and it comes out of the printer with no extra plumbing.
+
+## Constraints / preferences
+
+- Python (matches existing `mcp-gemma4` pattern in this repo).
+- stdio transport (matches existing pattern; local-only invocation, no network exposure of the MCP itself).
+- Single tool, minimal surface — markdown in, paper out.
+- Mirrors conventions documented in `~/bin/POS_PRINT.md` (Font B, 57 cols, native QR, TCP to `192.168.0.184:9100`).