refactor: rename lib/ to core/ for clearer core-module separation

Rename the top-level lib/ directory to core/ so the project root
immediately communicates which code is core platform and which lives
in modules/. PHP namespaces (MintyPHP\*) are unchanged — only the
Composer PSR-4 path mapping moves from lib/ to core/.

Module-internal lib/ directories (modules/*/lib/) are untouched.

Updated across the full stack:
- composer.json PSR-4 mapping
- bootstrap entry points (web/index.php, bin/*, tests/bootstrap.php)
- tooling configs (phpstan.neon, phpunit.xml, php-cs-fixer)
- 26 architecture contract tests
- enforcement-policy, guard-catalog, quality-gates
- all documentation (CLAUDE.md, README, 25 docs/, .agents/skills/)
- bin/qa-extended.sh search paths
- .claude/settings.local.json permission paths

Workflow: .agents/runs/CORE-LIB-RENAME-001/ (Analyst → Planner →
Executor → Code Review (4 findings fixed) → Security Review →
Acceptance Test → Finalizer)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/Support/Search/SearchQueryNormalizer.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace MintyPHP\Support\Search;
+
+class SearchQueryNormalizer
+{
+    // Prepares a user query for SQL LIKE. Escapes \ and _ (LIKE special chars),
+    // converts * to %, and wraps with % wildcards if not already present.
+    public static function normalizeLikeQuery(string $query): string
+    {
+        $query = trim($query);
+        if ($query === '') {
+            return '';
+        }
+
+        $query = str_replace('\\', '\\\\', $query);
+        $query = str_replace('_', '\\_', $query);
+        $query = str_replace('*', '%', $query);
+
+        if (!str_starts_with($query, '%')) {
+            $query = '%' . $query;
+        }
+        if (!str_ends_with($query, '%')) {
+            $query .= '%';
+        }
+
+        return $query;
+    }
+
+    // Strips wildcard chars for relevance scoring — score queries need a clean term, not a LIKE pattern.
+    public static function normalizeScoreQuery(string $query): string
+    {
+        $query = trim($query);
+        if ($query === '') {
+            return '';
+        }
+
+        return str_replace(['*', '%', '_'], '', $query);
+    }
+}