Deriving `Config` for enums about confique HOT 5 OPEN

#[derive(Debug, Deserialize, Config, Clone)]
pub struct Conf {
...
    #[config(nested)]
    pub backend: BackendConf,
}

#[derive(Debug, Deserialize, Config, Clone)]
pub struct BackendConf {
...
    pub actions: Option<ActionStorageConf>,
    pub blobs: Option<BlobStorageConf>,
}



#[derive(Debug, Deserialize, Clone)]
#[serde(tag = "module", content = "options")]
pub enum ActionStorageConf {
    #[serde(alias = "fs")]
    FS(FsActionStorageConf),
   ...
}

#[derive(Debug, Deserialize, Clone)]
#[serde(tag = "module", content = "options")]
pub enum BlobStorageConf {
    #[serde(alias = "fs")]
    FS(FsBlobStorageConf),
    ...
}

#[derive(Debug, Deserialize, Clone)]
pub struct FsActionStorageConf {
    pub path: PathBuf,
}

#[derive(Debug, Deserialize, Clone)]
pub struct FsBlobStorageConf {
    pub path: PathBuf,
    #[serde(default = "default_fs_blob_max_chunk_size")]
    pub max_chunk_size: usize,
}

#[derive(Clone, Debug, Deserialize, Eq, JsonSchema, PartialEq, Serialize)]
#[serde(
    untagged,
    expecting = "expected a project name or dependency config object"
)]
pub enum ProjectDependsOn {
    String(ProjectID),
    Object(DependencyConfig),
}


#[derive(Clone, Debug, Deserialize, Eq, JsonSchema, PartialEq, Serialize)]
#[serde(
    untagged,
    expecting = "expected a sequence of globs or a map of projects"
)]
pub enum WorkspaceProjects {
    Both {
        globs: Vec<FileGlob>,
        sources: ProjectsMap,
    },
    Globs(Vec<FileGlob>),
    Sources(ProjectsMap),
}