Add initial xlibre/X11 configs and installs, add misc install programs

docs/installation-reference/x11-xrandr-adding-new-resolutions-modes.md

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+# xlibre/x11 - adding xrandr modes
+
+## 2026-01-16, artix linux, framework 13in laptop
+
+### to add 1920x1280 resolution option:
+
+```sh
+dispmanage_modeline=$(cvt 1920 1280 60 | sed -n '2p' | sed -E "s/^Modeline //g")
+dispmanage_mode_id=$(printf "%s" "$dispmanage_modeline" | sed -E "s/^([^ ]+)\s.*$/\1/g")
+printf "%s" "$modeline" | xargs xrandr --newmode
+printf "%s" "$mode_id" | xargs xrandr --addmode eDP
+# NOTE: the lines above have been added to .xinitrc, just leaving here for reference
+
+# then, add the $mode_id value to my display-manage script as the target mode:
+DISPMANAGE_LAPTOP_MODE='"1920x1280_60.00"'
+```
+
+