feat(ai): add emacs-nox (PR 5/5)

Add Emacs nox (no X11) for terminal-based Emacs editing.

Depends on PR #7, #8, #9, and #10

env/.env.example.paperclip

@@ -1,26 +0,0 @@
-# Paperclip Environment Variables
-# Copy this file to your .env (at the compose root or docker-compose working directory)
-# and fill in the secrets.
-#
-#   cp env/.env.example.paperclip .env
-#
-# Then reference it from compose.yml:
-#   env_file:
-#     - path: .env
-#       required: true
-
-# ---------------------------------------------------------------------------
-# Database
-# ---------------------------------------------------------------------------
-# PostgreSQL password for the paperclip-db service.
-# Generate a strong random password:
-#   openssl rand -base64 32
-PAPERCLIP_DB_PASSWORD=change_me_to_a_strong_random_password
-
-# ---------------------------------------------------------------------------
-# Authentication
-# ---------------------------------------------------------------------------
-# Secret key used by Better Auth for signing and verifying tokens.
-# Generate a strong random secret:
-#   openssl rand -base64 32
-PAPERCLIP_AUTH_SECRET=change_me_to_a_strong_random_secret