Add analytics meta for downloading dependent projects (#6318)

* Send dependent mod info to backend

* Parse meta from query

* condense dependent_on and modpack

* Analytics dependents response

packages/app-lib/src/util/fetch.rs

@@ -35,6 +35,7 @@ pub struct DownloadMeta {
     pub reason: DownloadReason,
     pub game_version: String,
     pub loader: String,
+    pub dependent_on: Option<String>,
 }
 
 impl DownloadMeta {