docs(man): backfill man pages with wiki-only info (source-of-truth pass)

Port information that previously lived only in the GitHub wiki into the
authoritative scdoc man pages, so the man pages become the single source
of truth for module documentation.

33 man pages enriched (options, format replacements, actions, style
selectors, troubleshooting and implementation notes). Additions were
verified against the source; stale/incorrect wiki entries were
deliberately not ported. All pages still compile with scdoc.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

man/waybar-temperature.5.scd

@@ -156,6 +156,8 @@ Addressed by *temperature*
 
 *{temperatureK}*: Temperature in Kelvin.
 
+*{icon}*: Icon, as selected from *format-icons* based on the current temperature.
+
 # EXAMPLES
 
 ```
@@ -173,3 +175,24 @@ Addressed by *temperature*
 - *#temperature*
 - *#temperature.warning*
 - *#temperature.critical*
+
+# TROUBLESHOOTING
+
+## Finding your thermal zone
+
+To list all the thermal zone types, run:
+
+```
+for i in /sys/class/thermal/thermal_zone*; do echo "$i: $(<$i/type)"; done
+```
+
+## Finding an hwmon path
+
+If you do not have a thermal zone, use *sensors* to find the preferred
+temperature source, then run:
+
+```
+for i in /sys/class/hwmon/hwmon*/temp*_input; do echo "$(<$(dirname $i)/name): $(cat ${i%_*}_label 2>/dev/null || echo $(basename ${i%_*})) $(readlink -f $i)"; done
+```
+
+to find the path to the desired file, then set it in *hwmon-path*.