Redesign weather popup and auto-refresh forecast

Replace the inline detail flyout with a two-column hero: location chip
and large temperature on the left, big condition icon on the right.
Stats (Feels / Wind / Humidity) move below as caps-labeled columns,
separated from the forecast by a thin divider. Forecast cells now lead
with the day icon and put the day name above hi/lo temps.

Drop the Refresh and wttr.in pill buttons; a Timer refreshes the
forecast every refreshMinutes (default 15). The interval is exposed
through the Settings panel — Bar -> Weather has a gear that opens a
SpinBox-backed form, persisted as "settings": { "refreshMinutes": N }
in shell.json.

default/quickshell/omarchy-shell/plugins/bar/Bar.qml

@@ -312,7 +312,7 @@ Item {
     "calendar":           { displayName: "Calendar",           description: "Clock with month-grid popup",                  category: "Time",     allowMultiple: false, settingsForm: "calendarSettings" },
     "notificationCenter": { displayName: "Notification center", description: "Recent notifications + DND",  category: "Status",   allowMultiple: false },
     "systemStats":        { displayName: "System stats",       description: "CPU icon — hover for graphs, click to open btop", category: "System",   allowMultiple: false },
-    "weatherFlyout":      { displayName: "Weather",            description: "Weather pill with detail popup",              category: "Info",     allowMultiple: false },
+    "weatherFlyout":      { displayName: "Weather",            description: "Weather pill with detail popup",              category: "Info",     allowMultiple: false, settingsForm: "weatherSettings" },
     "idleInhibitor":      { displayName: "Keep awake",         description: "Toggle idle inhibitor",                       category: "System",   allowMultiple: false },
     "microphone":         { displayName: "Microphone",         description: "Mic input state and mute toggle",             category: "Audio",    allowMultiple: false },
     "activeWindow":       { displayName: "Active window",      description: "Title of the focused window",                 category: "Compositor", allowMultiple: false },