refactor: Cleanup git state - commit all staged changes

Major refactoring cleanup:
- Add new controller architecture (class-controller-*.php)
- Add new settings-v2 UI (views/settings-v2/)
- Add new CSS architecture (agentic-sidebar.css, tokens)
- Add esbuild build pipeline (scripts/build.js, package.json)
- Add composer dependencies (vendor/)
- Add frontend src directory (assets/js/src/index.jsx)
- Add documentation files
- Remove old/obsolete files (class-settings.php, old CSS)

This commits all pending changes from previous refactoring efforts.

vendor/symfony/console/Resources/completion.fish

@@ -0,0 +1,29 @@
+# This file is part of the Symfony package.
+#
+# (c) Fabien Potencier <fabien@symfony.com>
+#
+# For the full copyright and license information, please view
+# https://symfony.com/doc/current/contributing/code/license.html
+
+function _sf_{{ COMMAND_NAME }}
+    set sf_cmd (commandline -o)
+    set c (count (commandline -oc))
+
+    set completecmd "$sf_cmd[1]" "_complete" "--no-interaction" "-sfish" "-a{{ VERSION }}"
+
+    for i in $sf_cmd
+        if [ $i != "" ]
+            set completecmd $completecmd "-i$i"
+        end
+    end
+
+    set completecmd $completecmd "-c$c"
+
+    set sfcomplete (env SHELL_VERBOSITY=0 $completecmd)
+
+    for i in $sfcomplete
+        echo $i
+    end
+end
+
+complete -c '{{ COMMAND_NAME }}' -a '(_sf_{{ COMMAND_NAME }})' -f