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/league/tactician/composer.json

@@ -0,0 +1,38 @@
+{
+    "name":        "league/tactician",
+    "description": "A small, flexible command bus. Handy for building service layers.",
+    "keywords":    ["command", "command bus", "service layer"],
+    "license":     "MIT",
+    "authors": [
+        {
+            "name": "Ross Tuck",
+            "homepage": "http://tactician.thephpleague.com"
+        }
+    ],
+    "require": {
+        "php":  ">=7.1"
+    },
+    "require-dev": {
+        "mockery/mockery": "^1.3",
+        "phpunit/phpunit": "^7.5.20 || ^9.3.8",
+        "squizlabs/php_codesniffer": "^3.5.8"
+    },
+    "autoload": {
+        "psr-4": {
+            "League\\Tactician\\": "src"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "League\\Tactician\\Tests\\": "tests/"
+        },
+        "files": [
+            "tests/Fixtures/Command/CommandWithoutNamespace.php"
+        ]
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "2.0-dev"
+        }
+    }
+}