Initial standalone dectalk TTS server extracted from the ttstoy bot cog

Self-contained HTTP service with engine, data, start script, systemd unit,
and documentation. Runs independently of the Discord bot on its fixed port.

package.json

@@ -0,0 +1,20 @@
+{
+  "name": "dectalk-server",
+  "version": "1.0.0",
+  "description": "DECTalk TTS server compatible with RedBot TTSTOY cog",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js",
+    "dev": "nodemon server.js"
+  },
+  "keywords": ["dectalk", "tts", "text-to-speech", "redbot", "moonbase-alpha"],
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "express": "^4.18.2",
+    "dectalk": "^1.0.0"
+  },
+  "devDependencies": {
+    "nodemon": "^3.0.1"
+  }
+}