FEATURE: [chart] Indicator Chart

[dboyliao]

Example chart.yaml:

---
sessions:
  binance:
    exchange: binance
    envVarPrefix: binance

sharedChartOptions: &sharedChartOptions
  include_volume: true
  range_padding: 0.15
  width: 2400
  height: 800

chart:
  - kind: kline
    options:
      <<: *sharedChartOptions
      title: "BTCUSDT KLine Chart"
  - kind: supertrend
    options:
      <<: *sharedChartOptions
      title: "BTCUSDT SuperTrend Chart"
      window: 10
      multiplier: 3
      upper_bound_color: "red"
      lower_bound_color: "blue"
  - kind: atr
    options:
      <<: *sharedChartOptions
      title: "BTCUSDT ATR Chart"
      window: 14
      value_color: "red"

With one command, bbgo chart --config chart.yaml --session=binance --interval=4h --since=2025-12-31T00:00:00Z --symbol=BTCUSDT, we can generate three figures at once