separate `installed` and `latest` properties on software

[aboe026]

instead of all properties for the software flattened out on it, create separate installed and latest properties like so:

{
  "name": "test",
  "installed": {
    "type": "command",
    "executable": {
      "command": "test-binary"
    },
    "args": "hello-world",
    "shell": "",
    "regex": "version v(.*)",
  },
  "latest": {
    "type": "request",
    "url": "https://google.com",
    "regex": "version v(.*)"
  }
}