Add server CLI tools installer for Ubuntu/Debian servers

Introduce a self-contained repo with an interactive install.sh that
provisions zsh, oh-my-zsh, aliases, bat/yazi configs, docker shortcuts,
and git-delta pager setup. Configs are adapted from dotfiles for SSH-only
servers — no desktop or neovim dependencies.

Installer supports --all, --update (git pull + re-run), and --uninstall
with backup restore. Core packages include vim (default editor), yazi via
apt, and idempotent apt installs with warnings for eza and git-delta when
repos lack them.

configs/zshrc

@@ -0,0 +1,19 @@
+export ZSH="$HOME/.oh-my-zsh"
+export ALIASES="$HOME/.config/aliases"
+export CT_DIR="$HOME/.config/custom_tools"
+export EDITOR="vim"
+ZSH_THEME=""
+DISABLE_AUTO_TITLE="true"
+plugins=(
+  git
+  zsh-syntax-highlighting
+  zsh-autosuggestions
+  z
+)
+source $ZSH/oh-my-zsh.sh
+source $HOME/.config/zsh/zhann-elvis.zsh-theme
+source $ALIASES/.aliases
+autoload -Uz zcalc
+[ -f /usr/share/doc/fzf/examples/key-bindings.zsh ] && source /usr/share/doc/fzf/examples/key-bindings.zsh
+[ -f /usr/share/doc/fzf/examples/completion.zsh ] && source /usr/share/doc/fzf/examples/completion.zsh
+command -v fzf >/dev/null 2>&1 && eval "$(fzf --zsh 2>/dev/null)" || true