refactor: remove Provisioner trait

refactor: abstract VmHostClient from ProxmoxClient
tests: add integration test for LnVpsProvisioner

src/host/libvirt.rs

@@ -0,0 +1,40 @@
+use crate::host::{CreateVmRequest, VmHostClient};
+use crate::status::VmState;
+use lnvps_db::{async_trait, Vm, VmOsImage};
+
+pub struct LibVirt {}
+
+#[async_trait]
+impl VmHostClient for LibVirt {
+    async fn download_os_image(&self, image: &VmOsImage) -> anyhow::Result<()> {
+        todo!()
+    }
+
+    async fn generate_mac(&self, vm: &Vm) -> anyhow::Result<String> {
+        todo!()
+    }
+
+    async fn start_vm(&self, vm: &Vm) -> anyhow::Result<()> {
+        todo!()
+    }
+
+    async fn stop_vm(&self, vm: &Vm) -> anyhow::Result<()> {
+        todo!()
+    }
+
+    async fn reset_vm(&self, vm: &Vm) -> anyhow::Result<()> {
+        todo!()
+    }
+
+    async fn create_vm(&self, cfg: &CreateVmRequest) -> anyhow::Result<()> {
+        todo!()
+    }
+
+    async fn get_vm_state(&self, vm: &Vm) -> anyhow::Result<VmState> {
+        todo!()
+    }
+
+    async fn configure_vm(&self, vm: &Vm) -> anyhow::Result<()> {
+        todo!()
+    }
+}