Add a switchers chapter and fix drift found on a second manual pass

Add "Coming From Mac or Windows" as chapter 3: a translation layer for
Cmd/Win instincts rather than a feature tour.

Fill the remaining coverage gaps: fcitx5 input methods, laptop speaker
tuning, touchpad haptics, crash capture in the toggle table, the
installable font list, and the ChatGPT Desktop and Grok Bot entries.

Correct claims that drifted from the source: the network and bluetooth
bar icons no longer launch nmtui/bluetoothctl, monitor scaling steps
rather than cycles, and the display widget's scroll steps brightness.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

manual/10-notices.md

@@ -0,0 +1,23 @@
+# Notices
+
+You can quickly access the date and time, battery status, and current weather using the hotkey notices.
+
+### Date & Time
+
+`Super + Ctrl + Alt + T`
+
+ ![datetime-notice.png](https://learn.omacom.io/u/datetime-notice-dnB5VT.png)
+
+### Weather
+
+`Super + Ctrl + Alt + W`
+
+ ![weather-notice.png](https://learn.omacom.io/u/weather-notice-MV7Jj1.png)
+
+The location is detected from your IP address, which is usually close enough, but not always. You can pin it down with `omarchy weather location --set Malibu`, or be exact about it by adding coordinates: `omarchy weather location --set Malibu 34.0259,-118.7798`. Run `omarchy weather location` on its own to see where it thinks you are, and `--clear` to go back to auto-detection.
+
+### Battery
+
+`Super + Ctrl + Alt + B`
+
+ ![battery-notice.png](https://learn.omacom.io/u/battery-notice-jyKv9S.png)