Introduction of BitWarden package + prep

+ BitWarden module for easy autologon (not very secure but convinent on
  personal machines) - Will think this over some more afterwards
* Get-Path will always return without trailing directory separator
  (might want to make this 'always' for dirs, but unsure yet)
+ Added Edit-MountUnit scaffolding for later modifying it to import a
  template on new mount units, and easy edit of systemd mount and
  automount units.

base.linux/profile.d/env.ps1

@@ -6,4 +6,18 @@ if( -not (Test-Path env:XDG_DATA_HOME) ) {
 }
 if( -not (Test-Path env:XDG_CONFIG_HOME) ) {
    $env:XDG_CONFIG_HOME="$HOME/.config"
-}
+}
+
+if(  -not (
+        Test-Path env:SHELL_PARENT
+    ) -and -not (
+        $env:SHELL -match 'p(wsh|owershell)$'
+    ) -and (
+        Test-Path env:SHELL
+    )
+) {
+    $env:COMPLETION_SHELL_PREFERENCE = $env:SHELL
+    $env:SHELL_PARENT = $env:SHELL
+}
+$env:SHELL = Get-Process -Id $PID | Select-Object -ExpandProperty Path
+Set-UnixCompleter -Shell $env:COMPLETION_SHELL_PREFERENCE