Add mc config, lazygit/nerd-font installers, fzf/zoxide bash integration

- New mc package: seasons-winter16M skin (fixes washed-out file colors
  under the old default skin), arrow-key panel navigation, and
  Backspace bound as an alt key for CdParent (Double Commander-style
  parent-dir navigation).
- setup.sh: install_lazygit and install_nerd_font helpers, since
  neither ships as an apt/PPA package on this distro anymore.
- bash/.bashrc.omb: wire up fzf key-bindings and zoxide, drop the now-
  redundant bashmarks plugin, enable globstar, and widen history.

bash/.bashrc.omb

@@ -17,7 +17,6 @@ if [ -d "$HOME/.oh-my-bash" ]; then
 
     plugins=(
       git
-      bashmarks
     )
 
     source "$OSH/oh-my-bash.sh"
@@ -26,6 +25,26 @@ fi
 # PATH
 export PATH="$HOME/.local/bin:$PATH"
 
+# History
+HISTSIZE=100000
+HISTFILESIZE=200000
+HISTTIMEFORMAT="%F %T "
+
+# Recursive globbing with **
+shopt -s globstar
+
+# fzf — fuzzy Ctrl+R history / Ctrl+T file search
+if command -v fzf &>/dev/null; then
+    for f in /usr/share/doc/fzf/examples/key-bindings.bash /usr/share/fzf/key-bindings.bash; do
+        [ -f "$f" ] && source "$f" && break
+    done
+fi
+
+# zoxide — frecency-based `cd` replacement (use `z <dir>`)
+if command -v zoxide &>/dev/null; then
+    eval "$(zoxide init bash)"
+fi
+
 # Color support
 if [ -x /usr/bin/dircolors ]; then
     test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"