feat: Add host sydpc

My, this is a lot TwT.  Much work was batched as part of the transition from
guix-rebound to nixos-testbed/sydpc.

- Discord/Vesktop module & config.
- Syncthing setup.
- Assorted Emacs changes.
- Waybar config.
- Niri config.
- Steam config.
- Some MPD.
- Stylix config.
- Files/Impermanence things.
- Enable Ghostty.
- God knows what else.

modules/home/users/crumb/waybar/src/cputemp

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+
+check() {
+  command -v "$1" 1>/dev/null
+}
+
+check sensors || exit
+
+data="$(sensors coretemp-isa-0000 | sed 's/+//g')"
+package="$(echo "$data" | awk -e '/Package/ {print $4}')"
+coretemp="$(echo "$data" | awk -e '/Core/ {print $3}')"
+
+tooltip="<b>Core Temp: $package </b>\n"
+
+# "format-icons" : [ "", "", "", "", "" ] ,
+tempint=''${package%.*}
+temp="<b>''${tempint}󰔄</b>"
+# icon=""
+class="cool"
+[ "$tempint" -gt 50 ] && {
+  # icon=""
+  class="normal"
+}
+[ "$tempint" -gt 70 ] && {
+  # icon=" "
+  class="warm"
+}
+[ "$tempint" -gt 85 ] && {
+  # icon=" "
+  class="warn"
+}
+[ "$tempint" -gt 95 ] && {
+  # icon=" "
+  class="critical"
+}
+
+j=0
+for i in $coretemp; do
+  tooltip+="Core $j: $i\n"
+  ((j = j + 1))
+done
+tooltip="''${tooltip::-2}"
+cat <<EOF
+{"text":"$temp","tooltip":"$tooltip", "class": "$class"}
+EOF