chore(zsh): removed oh-my-zsh and made the config cleaner

.config/zsh/overrides.zsh

@@ -1,7 +1,9 @@
 ZSH_AUTOSUGGEST_STRATEGY=(match_prev_cmd history completion)
 
 if [[ ! $(tty) =~ ^/dev/tty[0-9]*$ ]]; then
-    ZSH_TMUX_AUTOSTART=true
+    if [[ -z $TMUX ]]; then
+        tmux new -As0
+    fi
 fi
 
 zstyle ':fzf-tab:complete:cd:*' fzf-preview 'eza -1 --color=always $realpath'