Replace red with amber, unify palette, add fetch/pull aliases

- Add git aliases: f (fetch), p (pull) and shell aliases: gf, gp
- Replace all #F40404 (red) with #F88C14 (amber) across prompt, gitconfig,
  vim, bat theme, and tmux scripts for colourblind-friendly palette
- Standardise hex case to uppercase throughout
- Unify #728cb8 → #7290B8 (fix blue inconsistency)
- Replace unique #8787AF with palette #7290B8 in gitconfig
- Remove unused red colour definition from prompt.zsh
- Update dark diff backgrounds from red-tinted to amber-tinted

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

home/.tmux/network.sh

@@ -42,13 +42,13 @@ else
 fi
 
 if [[ -z "$ms" ]]; then
-    result="#[fg=#F40404]󰤭 --#[default]"
+    result="#[fg=#F88C14]󰤭 --#[default]"
 elif (( ms <= 50 )); then
     result="#[fg=#808080]${icon} ${ms}ms#[default]"
 elif (( ms <= 150 )); then
-    result="#[fg=#f88c14]${icon} ${ms}ms#[default]"
+    result="#[fg=#F88C14]${icon} ${ms}ms#[default]"
 else
-    result="#[fg=#F40404]${icon} ${ms}ms#[default]"
+    result="#[fg=#F88C14]${icon} ${ms}ms#[default]"
 fi
 
 echo "$result" | tee "$cache"