feat: initial fish shell configuration

- Core config layered on CachyOS base with Catppuccin Mocha theming
- Fisher plugins: fzf.fish, catppuccin, autopair, replay, puffer-fish, magic-enter, spark
- Smart CLI wrappers with fallbacks (bat, lsd, btop, dust, prettyping)
- Custom functions: git, docker, network, kitty, AI session management
- Extensive abbreviation system for keyboard-driven workflows
- Secrets/local sourcing pattern for private and machine-specific config
- README with full documentation and personalization guide
- AGPLv3+ license with copyright headers on all source files

conf.d/wakatime.fish

@@ -0,0 +1,43 @@
+###
+# wakatime.fish
+#
+# hook script to send wakatime a tick (unofficial)
+# see: https://github.com/ik11235/wakatime.fish
+###
+
+function __register_wakatime_fish_before_exec -e fish_postexec
+  if set -q FISH_WAKATIME_DISABLED
+    return 0
+  end
+  
+  set -l exec_command_str
+
+  set exec_command_str (string split -f1 ' ' "$argv")
+
+  if test "$exec_command_str" = 'exit'
+    return 0
+  end
+
+  set -l PLUGIN_NAME "ik11235/wakatime.fish"
+  set -l PLUGIN_VERSION "0.0.6"
+
+  set -l project
+  set -l wakatime_path
+
+  if type -p wakatime 2>&1 > /dev/null
+    set wakatime_path (type -p wakatime)
+  else if type -p ~/.wakatime/wakatime-cli 2>&1 > /dev/null
+    set wakatime_path (type -p ~/.wakatime/wakatime-cli)
+  else
+    echo "wakatime command not found. Please read \"https://wakatime.com/terminal\" and install wakatime."
+    return 1
+  end
+
+  if git rev-parse --is-inside-work-tree &> /dev/null
+    set project (basename (git rev-parse --show-toplevel))
+  else
+    set project "Terminal"
+  end
+
+  $wakatime_path --write --plugin "$PLUGIN_NAME/$PLUGIN_VERSION" --entity-type app --project "$project" --entity "$exec_command_str" &> /dev/null&; disown
+end