Remove continuous empty lines

还没有人认领这个 Issue。

### How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

### Which OS are you using?

Linux

### What is the issue affecting?

Formatting

### Expected Behaviour

continuous empty lines should be removed

### Actual Behaviour

nothing happen?

### Reproduction steps

1. Go to lua source file
2. Add continuous empty lines
3. Click save to `Format` the code

### Additional Notes

I have the following vscode setting.json file:
```json
{
"Lua.format.defaultConfig": {
"indent_style": "tab",
"indent_size": "4",
"max_line_length": "80",
"max_continuous_line_distance": "1",
},
}
```

### Log File

[21:31:44.449][info] [#0:/home/wahabz/.vscode/extensions/sumneko.lua-3.6.2-linux-x64/server/main.lua:65]: Lua Lsp startup, root: /home/wahabz/.vscode/extensions/sumneko.lua-3.6.2-linux-x64/server
[21:31:44.450][info] [#0:/home/wahabz/.vscode/extensions/sumneko.lua-3.6.2-linux-x64/server/main.lua:66]: ROOT: /home/wahabz/.vscode/extensions/sumneko.lua-3.6.2-linux-x64/server
[21:31:44.450][info] [#0:/home/wahabz/.vscode/extensions/sumneko.lua-3.6.2-linux-x64/server/main.lua:67]: LOGPATH: /home/wahabz/.vscode/extensions/sumneko.lua-3.6.2-linux-x64/server/log
[21:31:44.450][info] [#0:/home/wahabz/.vscode/extensions/sumneko.lua-3.6.2-linux-x64/server/main.lua:68]: METAPATH: /home/wahabz/.vscode/extensions/sumneko.lua-3.6.2-linux-x64/server/meta
[21:31:44.450][info] [#0:/home/wahabz/.vscode/extensions/sumneko.lua-3.6.2-linux-x64/server/main.lua:69]: VERSION: 3.6.2
[21:31:44.520][info] [#0:script/service/service.lua:141]:
========= Medical Examination Report =========
--------------- Memory ---------------
Total: 1.545 MB
# 00 : 1.545 MB
# 01 : 0.000 MB
# 02 : 0.000 MB
# 03 : 0.000 MB
# 04 : 0.000 MB
--------------- Coroutine ---------------
Total: 0
Running: 0
Suspended: 0
Normal: 0
Dead: 0
--------------- Cache ---------------
Total: 1
Dead: 0
--------------- RPC ---------------
Holdon: 0
Waiting: 0
==============================================
[21:31:44.531][info] [#0:script/language.lua:137]: VSC language: en-us
[21:31:44.531][info] [#0:script/language.lua:138]: LS language: en-us

使用报告的 VS Code 设置在 Lua 源文件中复现格式化器的行为，尤其是 max_continuous_line_distance。首先追踪保存时使用的格式化入口并定位格式化器测试，然后验证格式化会移除连续的空行，同时遵守配置的最大距离。

由索引模型根据 Issue 内容生成。