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, 32 insertions, 0 deletions

diff --git a/dotfiles/common/.zshrc.d/git.sh b/dotfiles/common/.zshrc.d/git.sh
new file mode 100644
index 0000000..6c2b6ad
--- /dev/null
+++ b/dotfiles/common/.zshrc.d/git.sh
@@ -0,0 +1,32 @@
+# git.sh
+# Craig Jennings <c@cjennings.net>
+# Git aliases and convenience functions
+
+# =============================================================================
+# Aliases
+# =============================================================================
+alias gitlog="git log --graph --pretty=format:'%Cred%h%Creset %an: %s - %Creset %C(yellow)%d%Creset %Cgreen(%cr)%Creset' --abbrev-commit --date=relative"
+alias gitstatus='git status -sb'
+alias gitcom='git commit -m'
+alias gitpp='git pull --prune'
+alias gittagbydate="git for-each-ref --sort=creatordate --format '%(refname) %(creatordate)' refs/tags"
+
+# =============================================================================
+# Functions
+# =============================================================================
+
+# Stash, pull, pop
+gitsp() {
+    git stash && git pull && git stash pop
+}
+
+# Checkout branch with fzf
+gitck() {
+    git checkout "$(git branch --all | fzf | tr -d '[:space:]')"
+}
+
+# Diff with fzf preview
+gitdiff() {
+    preview="git diff $@ --color=always -- {-1}"
+    git diff "$@" --name-only | fzf -m --ansi --preview "$preview"
+}