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/phpdocumentor/reflection/psalm.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0"?>
+<psalm
+    errorLevel="1"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="https://getpsalm.org/schema/config"
+    xsi:schemaLocation="https://getpsalm.org/schema/config file:///composer/vendor/vimeo/psalm/config.xsd"
+    errorBaseline="psalm-baseline.xml"
+>
+    <projectFiles>
+        <directory name="src" />
+        <ignoreFiles>
+            <!--
+            ExpressionPrinter inherits all kinds of errors from PHP-Parser that I cannot fix, until a solution is found
+            we ignore this
+            -->
+            <file name="src/phpDocumentor/Reflection/Php/Expression/ExpressionPrinter.php"/>
+            <directory name="vendor" />
+        </ignoreFiles>
+    </projectFiles>
+
+    <issueHandlers>
+        <LessSpecificReturnType errorLevel="info" />
+        <MoreSpecificImplementedParamType errorLevel="info" />
+        <DeprecatedConstant errorLevel="info" />
+    </issueHandlers>
+</psalm>