add entry/exit functions to readme.

rethrow LoginError exceptions, let the consumer handle it.

lib/Voicemeeter.psm1

@@ -105,7 +105,7 @@ Function Connect-Voicemeeter {
     }
     catch [LoginError] {
         Write-Warning $_.Exception.ErrorMessage()
-        Exit
+        throw
     }
 }
 

lib/base.ps1

@@ -45,7 +45,7 @@ function Login {
     }
     catch [LoginError], [CAPIError] {
         Write-Warning $_.Exception.ErrorMessage()
-        exit
+        throw
     }
 
     while (P_Dirty -or M_Dirty) { Start-Sleep -m 1 }