feat: Add support for virt package

- Add sal-virt package to the workspace members
- Update MONOREPO_CONVERSION_PLAN.md to reflect the
  completion of sal-process and sal-virt packages
- Update src/lib.rs to include sal-virt
- Update src/postgresclient to use sal-virt instead of local
  virt module
- Update tests to use sal-virt

src/postgresclient/installer.rs

@@ -10,7 +10,7 @@ use std::process::Command;
 use std::thread;
 use std::time::Duration;
 
-use crate::virt::nerdctl::Container;
+use sal_virt::nerdctl::Container;
 use std::error::Error;
 use std::fmt;
 

src/postgresclient/tests.rs

@@ -138,7 +138,7 @@ mod postgres_client_tests {
 #[cfg(test)]
 mod postgres_installer_tests {
     use super::*;
-    use crate::virt::nerdctl::Container;
+    use sal_virt::nerdctl::Container;
 
     #[test]
     fn test_postgres_installer_config() {