Added 60dB integration

[manishEMS47]

What we added

A new sinapsis_60db package (mirrors the ElevenLabs package structure) with 3 TTS templates:

• SixtyDBTTS → POST /tts-synthesize (single request)
• SixtyDBTTSStream → POST /tts-stream (NDJSON streaming)
• SixtyDBTTSWebSocket → wss://api.60db.ai/ws/tts (websocket streaming)

Plus: a SixtyDBClient (REST + WS wrapper, since 60db has no SDK), voice resolution via GET /myvoices, SIXTYDB_API_KEY env var, 6 YAML
configs, 3 Gradio webapps, package pyproject.toml/README/LICENSE, and wiring into the root pyproject.toml, docker/compose_apps.yaml,
and top-level README.

All templates output the same AudioPacket as ElevenLabs, so they're drop-in interchangeable.

How to use it

1. Set your key:
   export SIXTYDB_API_KEY='your-api-key'

2. Run it — pick one:

CLI (saves a .wav)

sinapsis run packages/sinapsis_60db/src/sinapsis_60db/configs/sixtydb_tts.yaml

Webapp

uv run webapps/generic_tts_apps/sixtydb_tts_app.py

Docker

docker compose -f docker/compose_apps.yaml up -d sinapsis-60db

Or use in your own YAML:

• template_name: SixtyDBTTS
  class_name: SixtyDBTTS
  template_input: TextInput
  attributes:
  voice: null # name/ID, or null for default
  output_format: mp3 # mp3 | wav | ogg | flac
  speed: 1.0 # 0.5–2.0
  stability: 50.0 # 0–100
  similarity: 75.0 # 0–100