[Bug]: LGSM instance config file "startparamerers" value overrides defaults and does not append.

### User story

As a Garry's mod server owner, I want the "startparameters" option in the instance config for my gmae server to append values to the default srcds.exe command line arguments, not override them.

### Game

Garry's Mod

### Linux distro

Ubuntu 24.04

### Command

command: start

### Further information

Per the documentation: https://docs.linuxgsm.com/configuration/start-parameters#additional-parameters,

I would expect any values added to the "startparameters" field in the instance config file (`/lgsm/config-lgsm/myserver/myserver.cfg`) to be APPENDED to the srcds.exe command line arguments, not override them. The latter seems to be happening.

Before adding my own "startparameters" value (these are the results of running the `details` command):

` ./srcds_run -game garrysmod -strictportbind -ip 0.0.0.0 -port 27015 -tickrate 66 +host_workshop_collection FAKEWORKSHOPCOLLENTION +clientport 27005 +tv_port 27020 +gamemode terrortown +map gm_construct +sv_setsteamaccount FAKESTEAMACCOUNT +servercfgfile gmodserver.cfg -maxplayers 16 -disableluarefresh`

After adding a value of "-authkey AUTHKEY" to "startparameters":

`./srcds_run -authkey AUTHKEY`

As you can see, all defaults are gone. The expected result is like so:

` ./srcds_run -game garrysmod -strictportbind -ip 0.0.0.0 -port 27015 -tickrate 66 +host_workshop_collection FAKEWORKSHOPCOLLENTION +clientport 27005 +tv_port 27020 +gamemode terrortown +map gm_construct +sv_setsteamaccount FAKESTEAMACCOUNT +servercfgfile gmodserver.cfg -maxplayers 16 -disableluarefresh -authkey AUTHKEY`

Am I missing something or am I correct in thinking this a bug?

### Relevant log output

```shell

```

### Steps to reproduce

1. Edit your LGSM instance config (yourserver.cfg)
2. Add a "startparameters" value, e.g. `startparameters="-authkey FAKEAUTHKEY"`
3. Restart the server
4. Run the `details` command (`./yoursever details`)
5. See that the "Command-line Parameters" section is now only displaying your change without the defaults.