feat(log): 新增支持删除部分日志 add function to delete logs older than specified months

- Add deleteMonthLog functionality to log system
- Create new route and controller method for handling log deletion
- Implement frontend UI and logic for selecting and confirming log deletion-Add necessary database queries to safely delete logs

app/admin/view/system/log/delete_month_log.html

@@ -0,0 +1,23 @@
+<div class="layuimini-container">
+
+    <form id="app-form" class="layui-form layuimini-form">
+
+        <div class="layui-form-item">
+
+            <div class="layui-input-group">
+                <div class="layui-input-prefix layui-input-split">删除</div>
+                <label>
+                    <input type="number" name="month" lay-affix="number" placeholder="" min="1" class="layui-input" value="3">
+                </label>
+                <div class="layui-input-suffix layui-input-split">个月前的日志</div>
+            </div>
+
+        </div>
+
+        <div class="hr-line"></div>
+        <div class="layui-form-item text-center">
+            <button type="button" class="layui-btn" lay-submit lay-filter="submit">提交</button>
+        </div>
+    </form>
+
+</div>