feat: tmux improvements

Added statusline configuration (colour, left length). Added tpm (tmux
plugin manager). Added tmux-sessionizer script and some keybinds for it.

tmux/tmux-sessionizer

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+if [[ $# -eq 1 ]]; then
+    selected=$1
+else
+    selected=$(find -L $GGROOT -mindepth 1 -maxdepth 5 -type d -name .git  -prune | xargs -n 1 dirname | fzf)
+fi
+
+if [[ -z $selected ]]; then
+    exit 0
+fi
+
+
+selected_name=$(basename "$selected" | tr . _)
+tmux_running=$(pgrep tmux)
+
+if [[ -z $TMUX ]] && [[ -z $tmux_running ]]; then
+    tmux new-session -s $selected_name -c $selected
+    exit 0
+fi
+
+if ! tmux has-session -t=$selected_name 2> /dev/null; then
+    tmux new-session -ds $selected_name -c $selected
+fi
+
+tmux switch-client -t $selected_name