feat: add statsDaemon.interval setting, pass --interval to nova-stats

modules/Modules.qml

@@ -89,6 +89,9 @@ QtObject {
     property var overviewBackdrop: ({
             enable: true
         })
+    property var statsDaemon: ({
+            interval: -1
+        })
 
     property FileView _file: FileView {
         path: (Quickshell.env("XDG_CONFIG_HOME") || (Quickshell.env("HOME") + "/.config")) + "/nova-shell/modules.json"

modules/SystemStats.qml

@@ -29,7 +29,10 @@ QtObject {
     // nova-stats stream (cpu + mem)
     property var _statsProc: Process {
         running: true
-        command: ["nova-stats"]
+        command: {
+            const ms = M.Modules.statsDaemon.interval;
+            return ms > 0 ? ["nova-stats", "--interval", ms.toString()] : ["nova-stats"];
+        }
         stdout: SplitParser {
             splitMarker: "\n"
             onRead: line => {