Initial standalone morshu 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.

INSTALL.md

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+# Installing the Morshu TTS Server as a system service
+
+These steps install the server as a systemd service that starts on boot and
+restarts automatically if it crashes. Commands that need root are shown with
+`sudo`; run them in your own terminal.
+
+## 1. Install prerequisites
+
+```bash
+sudo apt install python3 python3-venv
+```
+
+## 2. Create the virtual environment
+
+The first run of `start.sh` creates a local venv and installs the Python
+dependencies from requirements.txt. You can prime it now:
+
+```bash
+cd /home/owen/morshu-tts-server
+./start.sh
+```
+
+Stop it with Ctrl+C once you see the ready message, then install the unit.
+
+## 3. Install the systemd unit
+
+```bash
+sudo cp /home/owen/morshu-tts-server/morshu-tts-server.service /etc/systemd/system/
+sudo systemctl daemon-reload
+sudo systemctl enable --now morshu-tts-server
+```
+
+## 4. Verify
+
+```bash
+systemctl status morshu-tts-server
+curl -s http://127.0.0.1:33002/health
+```
+
+The health endpoint should return `ok`.
+
+## Managing the service
+
+```bash
+sudo systemctl restart morshu-tts-server
+sudo systemctl stop morshu-tts-server
+journalctl -u morshu-tts-server -f
+```