Add msvc update to `bat` installer (super easy)

[coolaj86]

We need to update bat to install MSVC the same as dotenv-linter, and update the README:

• dotenv-linter updates
  • https://github.com/webinstall/webi-installers/pull/674/files
• bat's install.ps1
  • https://github.com/webinstall/webi-installers/blob/main/bat/install.ps1
• bat's README.md
  • https://github.com/webinstall/webi-installers/blob/main/bat/README.md

This section should be added above the # Fetch archive section:

# Fetch MSVC Runtime
echo "Checking for MSVC Runtime..."
IF (-not (Test-Path "\Windows\System32\vcruntime140.dll"))
{
    & "$Env:USERPROFILE\.local\bin\webi-pwsh.ps1" vcruntime
}

The README should be updated as well to include similar language to dotenv-linter:

**Windows Users**

```text
\Windows\System32\vcruntime140.dll
```

This will also attempt to install the
[Microsoft Visual C++ Redistributable](/vcruntime) via `webi vcruntime`. If it
fails and you get the error _`vcruntime140.dll` was not found_, you'll need to
[install it manually](https://learn.microsoft.com/en-US/cpp/windows/latest-supported-vc-redist?view=msvc-170).

[PUNEET-EMM]

May i work on this...?

[coolaj86]

@PUNEET-EMM Looks like someone already took this, but there are equally easy ones if you check out #660, there's several dozen to choose from.