refactor: restructure functional tests under pkgs/ category

tests/functional/pkgs/lua/test_lua_error_handling/main.fmf

@@ -0,0 +1,12 @@
+summary: 功能测试 - lua - 错误处理
+test: ./test.sh
+tag:
+  - functional
+  - lua
+duration: 2m
+tier: 1
+path: /tests/functional/pkgs/lua/test_lua_error_handling
+test_lua_error-handling
+错误处理
+require:
+  - lua

tests/functional/pkgs/lua/test_lua_error_handling/test.sh

@@ -0,0 +1,38 @@
+#!/bin/sh -eux
+# Functional test: lua - 错误处理
+
+rlRun() { eval "$1" 2>&1; return $?; }
+# === SETUP: check/install lua ===
+INSTALLED_BY_TEST=0
+if ! rpm -q lua 2>/dev/null; then
+    if echo openruyi | sudo -S dnf install -y lua 2>/dev/null; then
+        INSTALLED_BY_TEST=1
+        echo "SETUP: installed lua"
+    else
+        echo "SKIP: lua not available in repos"
+        exit 0
+    fi
+else
+    echo "SETUP: lua already installed"
+fi
+
+TmpDir=$(mktemp -d)
+cd $TmpDir
+
+echo "=== 测试 2: 错误处理 ==="
+rlRun 'lua --invalid 2>&1 || true' 0 "lua: 无效选项"
+
+
+# === TEARDOWN: uninstall if we installed ===
+if [ "$INSTALLED_BY_TEST" = "1" ]; then
+    echo openruyi | sudo -S dnf remove -y lua 2>/dev/null || true
+    echo "TEARDOWN: removed lua"
+fi
+echo ""
+echo "All lua functional tests passed!"
+
+cd /
+rm -rf $TmpDir
+
+echo ""
+echo "All lua 错误处理 tests passed!"