[ZSH] Add atuin history with cwd, own Ctrl-R

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.config/atuin/config.toml

@@ -0,0 +1,7 @@
+## Overrides only; all defaults: `atuin default-config`
+
+## brew/pacman handle updates; no version check against api.atuin.sh
+update_check = false
+
+## Enter puts the command on the prompt for editing (like fzf) instead of running it
+enter_accept = false