feat: multiple graphs

src/sysinfo_snapshot.rs

@@ -0,0 +1,18 @@
+#[derive(Clone, Debug)]
+pub struct SysinfoSnapshot {
+    pub cpu_total: f32,
+    pub cpus: Vec<(String, f32)>,
+}
+
+impl From<&sysinfo::System> for SysinfoSnapshot {
+    fn from(value: &sysinfo::System) -> Self {
+        Self {
+            cpu_total: value.global_cpu_usage(),
+            cpus: value
+                .cpus()
+                .iter()
+                .map(|cpu| (cpu.name().into(), cpu.cpu_usage()))
+                .collect(),
+        }
+    }
+}