feat(guards): add opinionated component guards to config.fish and conf.d

Adds __fish_config_op_enabled helper (master __fish_config_opinionated
evaluated first via __fish_variable_check, then the category variable)
and gates C1-C4 components: CachyOS surgical override, PAGER/MANPAGER,
CDPATH, Vi mode, exit override, bang-bang bindings, history/cp/mv/wget/
grep aliases, cd->z alias, Fisher bootstrap and theme apply, paru/yay
wrapper generation, WakaTime hook, custom key chords, puffer, autopair,
starship prompt, Catppuccin colors, FZF_DEFAULT_OPTS, done notifications,
and Kitty/WezTerm window-management abbreviations.

conf.d/yay-wrapper.fish

@@ -5,6 +5,10 @@
 # /usr/bin/yay is installed. The wrapper tees yay output to a
 # timestamped log file and prunes old logs, mirroring smart_exit behavior.
 
+# Auto-generating a wrapper in ~/.local/bin is opinionated (C2 auto-exec).
+# Task #4's __fish_config_enable_logging will additionally gate this wrapper.
+__fish_config_op_enabled __fish_config_op_autoexec; or return
+
 set -l _yay_real /usr/bin/yay
 set -l _yay_wrapper "$HOME/.local/bin/yay"
 set -l _yay_wrapper_version 1