Metrics support

[ymtdzzz]

• Metrics stream page
  • [x] add basic feature
  • [x] filter metrics
  • [x] show metrics detail
  • [ ] show metrics summary chart
    • [x] Gauge
    • [x] Sum
    • [x] Histogram

    • 147

    • [ ] ExponentialHistogram

    • 148

    • [ ] Summary

    • 149

  • [x] render data points according to the timestamp
  • [ ] horizontal scrolling by key
• Metrics list page
  • [ ] add basic feature
  • [ ] filter metrics
  • [ ] flexible chart

[ymtdzzz]

I'd like have an index of service name and metric name and display a graph for each dimension from that.