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/wakatime.fish

@@ -5,6 +5,12 @@
 # see: https://github.com/ik11235/wakatime.fish
 ###
 
+# Local modification: opinionated guard (AGENTS.md Task #3). WakaTime
+# reporting is classified under both C2 auto-execution and C4 integrations;
+# disabling either category skips registering the hook.
+__fish_config_op_enabled __fish_config_op_autoexec; or exit
+__fish_config_op_enabled __fish_config_op_integrations; or exit
+
 function __register_wakatime_fish_before_exec -e fish_postexec
   if set -q FISH_WAKATIME_DISABLED
     return 0