waybar: add CPU usage/temp with color states and per-core tooltip

waybar/style.css

@@ -18,6 +18,7 @@ window#waybar {
 }
 
 #clock, #battery, #network, #pulseaudio,
+#cpu, #temperature,
 #custom-power-profile, #custom-fan-profile {
   padding: 0 12px;
 }
@@ -37,3 +38,19 @@ window#waybar {
 #battery.critical {
   color: #cc6666;
 }
+
+#cpu.warning {
+  color: #f0c674;
+}
+
+#cpu.critical {
+  color: #cc6666;
+}
+
+#temperature.warm {
+  color: #f0c674;
+}
+
+#temperature.critical {
+  color: #cc6666;
+}