Enhance shell widgets, tmux status, and git colors

- Add frecency scoring + git status boost to ^E edit widget
- Add network latency indicator to tmux status bar (wifi/wired detection, 10s cache)
- Add powerline separators between tmux status sections
- Swap git status colors: modified=bluish grey, untracked=amber (prompt, gitconfig, widget)
- Remove bold from feature branch name in prompt
- Add gw (git show) and gdm (diff against default branch) aliases

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

home/.gitconfig

@@ -50,8 +50,8 @@
 
 [color "status"]
   added = "#2CB494"
-  changed = "#F88C14"
-  untracked = "#808080" italic
+  changed = "#8787AF"
+  untracked = "#F88C14" italic
   branch = "#2CB494"
   header = "#CCE0D0"
 [color "diff"]