feat(windows): support cmd prompt

[jukrb0x]

Description

Support lvim running in Windows Command Prompt (cmd.exe), simply translate lvim.ps1 into lvim.bat and emplace it along with lvim.ps1.

Problem

I didn't find a secure way to set the current user's environment variable in the installer script, using setx could be dangerous:

the first time I tried in my cmd it overridden my %PATH%, %PATH% in the cmd includes both the system environment variable and user environment variable, and it somehow happens to truncate to 1024 characters.

so for now user has to manually add an environment variable, I am seeking a secure method to add a user environment variable.

How Has This Been Tested?

1. add %USERPROFILE%\.local\bin\ to user environment variables
2. run lvim normally in cmd.exe

[kylo252]

how does this compare to invoking the powershell script directly (see #1893)?

• we won't have to maintain two different files
• arg parsing might be easier without routing to powershell?

@echo off
setlocal enabledelayedexpansion
set args=%*
:: replace problem characters in arguments
set args=%args:`"='%
set args=%args:(=``(%
set args=%args:)=``)%
set invalid=`"='
if !args! == !invalid! ( set args= )
powershell -noprofile -ex unrestricted `"& <lvim_ps1_path> $arg %args%;exit `$lastexitcode`"