feat: decouple Laravel and CakePHP installers, remove SonarQube artifacts, and enforce complete unit testing standards

- Decouple framework installation: add install-laravel.sh and install-cakephp.sh, isolate skills and docs per framework, and auto-clean leftover artifacts
- Remove all SonarQube configs, templates, and references
- Enforce comprehensive test completeness: 100% public methods, edge cases, full branch coverage, exception paths, and state assertions
- Replace all placeholder assertions in PHPUnit and Pest templates with full realistic implementations
- Rename and update 10-comprehensive-test-coverage-guide.md

install-cakephp.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+set -e
+
+SOURCE="${BASH_SOURCE[0]:-$0}"
+SCRIPT_DIR=""
+if [ -f "$SOURCE" ]; then
+    SCRIPT_DIR="$(cd -P "$(dirname "$SOURCE")" 2>/dev/null && pwd || echo "")"
+fi
+
+if [ -n "$SCRIPT_DIR" ] && [ -f "$SCRIPT_DIR/install.sh" ]; then
+    bash "$SCRIPT_DIR/install.sh" --cakephp "$@"
+else
+    DEFAULT_REPO="https://git.smartgift.io.vn/Smartgift-AI/agent-unit-testing.git"
+    REPO_URL="${SG_TEST_REPO:-${LARAVEL_TEST_REPO:-$DEFAULT_REPO}}"
+    TMP_DIR="$(mktemp -d 2>/dev/null || mktemp -d -t 'sg_cakephp_install')"
+    if git clone --depth 1 "$REPO_URL" "$TMP_DIR" --quiet 2>/dev/null; then
+        bash "$TMP_DIR/install.sh" --cakephp "$@"
+        rm -rf "$TMP_DIR"
+    else
+        echo "Lỗi: Không thể tải bộ công cụ từ $REPO_URL"
+        rm -rf "$TMP_DIR"
+        exit 1
+    fi
+fi