refactor(dotfiles): rename system/ to common/ and remove unused configs

Rename dotfiles/system to dotfiles/common for clarity - indicates
shared dotfiles used across all desktop environments (DWM, Hyprland).

Removed config directories for uninstalled applications:
- ghostty (using different terminal)
- lf (using ranger instead)
- mopidy (using mpd instead)
- nitrogen (X11-only, obsolete for Wayland)
- pychess (not installed)
- JetBrains (not installed via archsetup)
- youtube-dl (using yt-dlp with different config location)

Kept audacious config for potential future use.

Updated all references in archsetup, CLAUDE.md, todo.org, and
validation.sh.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 0 insertions, 32 deletions

diff --git a/dotfiles/system/.config/redshift.conf b/dotfiles/system/.config/redshift.conf
deleted file mode 100644
index 92b61bf..0000000
--- a/dotfiles/system/.config/redshift.conf
+++ /dev/null
@@ -1,32 +0,0 @@
-[redshift]
-; Color temperature in Kelvin
-; 6500K = neutral daylight (no filter)
-; 5000K = subtle warmth
-; 4500K = noticeable but readable warmth (recommended for night)
-; 4000K = warm (like incandescent bulb)
-; 3500K = very warm/orange (often too much)
-
-temp-day=6500
-temp-night=4500
-
-; Brightness (1.0 = full, 0.8 = 20% dimmed)
-; Keeping at 1.0 avoids readability issues
-brightness-day=1.0
-brightness-night=1.0
-
-; Gamma correction (1.0 = no correction)
-gamma=1.0
-
-; Fade between day/night (1 = gradual, 0 = instant)
-fade=1
-
-; Screen adjustment method
-adjustment-method=randr
-
-; Location for sunrise/sunset calculation
-location-provider=manual
-
-[manual]
-; New Orleans, LA
-lat=29.951065
-lon=-90.071533