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/graphviz/phpmd.xml.dist

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<ruleset
+    name="ProxyManager rules"
+    xmlns="http://pmd.sf.net/ruleset/1.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
+    xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd"
+>
+    <rule ref="rulesets/codesize.xml"/>
+    <rule ref="rulesets/unusedcode.xml"/>
+    <rule ref="rulesets/design.xml">
+        <!-- eval is needed to generate runtime classes -->
+        <exclude name="EvalExpression"/>
+    </rule>
+    <rule ref="rulesets/naming.xml">
+        <exclude name="LongVariable"/>
+    </rule>
+    <rule ref="rulesets/naming.xml/LongVariable">
+        <properties>
+            <property name="minimum">40</property>
+        </properties>
+    </rule>
+</ruleset>