Add: rust: osp-crate

Adds a crate that allows communicating with ospd through open scanner
protocol.

It implements the commands:

- Start: to initiate a scan
- Delete: to delete a specific scan
- Stop: to terminate a running scan
- Get: to retrieve scan results
- GetDelete: to fetch and delete scan results simultaneously

For example, here is how you can use OSP:

```rust,ignore
let json_str = r#"{
  "target": {
    "hosts": [
      "127.0.0.1"
    ]
  },
  "vts": [
    {
      "oid": "1.3.6.1.4.1.25623.1.0.10330"
    }
  ]
}"#;

// Deserialize json into a `Scan` struct
let scan: osp::Scan = serde_json::from_str(json_str).unwrap();

// Create a `Start` command using the `Scan`
let cmd = osp::ScanCommand::Start(scan);

// Send the command to the OSPD socket
println!("{:?}", osp::send_command("/run/ospd/ospd-openvas.sock", cmd))
```

rust/Cargo.toml

@@ -10,5 +10,6 @@ members = [
   "feed",
   "feed-verifier",
   "scanner-api",
-  "models"
+  "models",
+  "osp",
 ]

rust/doc/openapi.yml

@@ -544,6 +544,7 @@ components:
             - error
             - host_start
             - host_stop
+            - host_detail
         ip_address:
           description: "The IPv4 or IPv6 of the target the result was found."
           type: "string"
@@ -566,6 +567,9 @@ components:
         message:
           description: "Additional information about the result."
           type: "string"
+        details:
+          description: "An object with key and value pairs. Only set on `host_detail` and should be treated as a `HashMap<String, String>` as there is not formalization possible."
+          type: "object"
       required:
         - type