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/.github/workflows/ci.yml

@@ -0,0 +1,43 @@
+name: CI
+on: [push, pull_request]
+jobs:
+    build:
+        strategy:
+            matrix:
+                operating-system: ['ubuntu-latest']
+                php-versions: ['7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.4', '8.5']
+        runs-on: ${{ matrix.operating-system }}
+        steps:
+            -   name: Checkout
+                uses: actions/checkout@v4
+
+            -   name: Setup PHP, with composer and extensions
+                uses: shivammathur/setup-php@v2
+                with:
+                    php-version: ${{ matrix.php-versions }}
+                    coverage: pcov
+
+            -   name: Get composer cache directory
+                id: composercache
+                run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+            -   name: Cache composer dependencies
+                uses: actions/cache@v4
+                with:
+                    path: ${{ steps.composercache.outputs.dir }}
+                    # Use composer.json for key, if composer.lock is not committed.
+                    # key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+                    key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+                    restore-keys: ${{ runner.os }}-composer-
+
+            -   name: Check Composer configuration
+                run: composer validate --strict
+
+            -   name: Install dependencies
+                run: composer install --no-progress --prefer-dist --optimize-autoloader
+
+            -   name: Run code sniffer
+                run: vendor/bin/phpcs --standard=PSR2 src tests
+
+            -   name: Run unit tests
+                run: vendor/bin/phpunit