Add matrixbot source to repo

All bot source files from LXC 151 (/opt/matrixbot) are now tracked here.
Secrets (.env, credentials.json), venv dirs, and runtime state files
(nio_store, welcome_state.json, wordle_stats.json) are excluded via .gitignore.
Includes deploy.sh to sync files to /opt/matrixbot and restart the service.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

matrixbot/config.py

@@ -0,0 +1,46 @@
+import os
+import logging
+from dotenv import load_dotenv
+
+load_dotenv()
+
+
+# Required
+MATRIX_HOMESERVER = os.getenv("MATRIX_HOMESERVER", "https://matrix.lotusguild.org")
+MATRIX_USER_ID = os.getenv("MATRIX_USER_ID", "@lotusbot:matrix.lotusguild.org")
+MATRIX_ACCESS_TOKEN = os.getenv("MATRIX_ACCESS_TOKEN", "")
+MATRIX_DEVICE_ID = os.getenv("MATRIX_DEVICE_ID", "")
+MATRIX_PASSWORD = os.getenv("MATRIX_PASSWORD", "")
+
+# Bot settings
+BOT_PREFIX = os.getenv("BOT_PREFIX", "!")
+ADMIN_USERS = [u.strip() for u in os.getenv("ADMIN_USERS", "").split(",") if u.strip()]
+LOG_LEVEL = os.getenv("LOG_LEVEL", "INFO")
+
+# Integrations
+OLLAMA_URL = os.getenv("OLLAMA_URL", "http://10.10.10.157:11434")
+OLLAMA_MODEL = os.getenv("OLLAMA_MODEL", "lotusllm")
+MINECRAFT_RCON_HOST = os.getenv("MINECRAFT_RCON_HOST", "10.10.10.67")
+MINECRAFT_RCON_PORT = int(os.getenv("MINECRAFT_RCON_PORT", "25575"))
+MINECRAFT_RCON_PASSWORD = os.getenv("MINECRAFT_RCON_PASSWORD", "")
+
+# Constants
+MAX_INPUT_LENGTH = 500
+MAX_DICE_SIDES = 100
+MAX_DICE_COUNT = 20
+COOLDOWN_SECONDS = int(os.getenv("COOLDOWN_SECONDS", "120"))
+RCON_TIMEOUT = 5.0
+MIN_USERNAME_LENGTH = 3
+MAX_USERNAME_LENGTH = 16
+
+
+class ConfigValidator:
+    REQUIRED = ["MATRIX_HOMESERVER", "MATRIX_USER_ID"]
+
+    @classmethod
+    def validate(cls):
+        errors = []
+        for var in cls.REQUIRED:
+            if not os.getenv(var):
+                errors.append(f"Missing required: {var}")
+        return errors