Add machine metrics to Tuist Runners CI jobs

Tuist Runners CI jobs now surface machine metrics for the runner that executed them. The runner job detail page gets a new Metrics tab with charts for CPU, Memory, Network, CPU I/O Wait, and Storage, and a compact CPU/Memory/Network row is shown on the Overview above the Steps card for an at-a-glance read. Charts render on a time axis with uniform percent scales and point-to-point segments so real spikes and dips are visible. Hovering a step in the Steps list shades that step’s time window across every chart, letting you correlate resource usage with the step that produced it. Jobs that have no samples yet show an empty state. The feature ships behind the existing :runners beta flag.