fix(app): make instances with non-UTF8 text file encodings launcheable and importable (#3721)

Previous to these changes, the app always assumed that Minecraft and
other launchers always use UTF-8, which is not necessarily always true.

packages/app-lib/Cargo.toml

@@ -20,6 +20,8 @@ tempfile.workspace = true
 dashmap = { workspace = true, features = ["serde"] }
 quick-xml = { workspace = true, features = ["async-tokio"] }
 enumset.workspace = true
+chardetng.workspace = true
+encoding_rs.workspace = true
 
 chrono = { workspace = true, features = ["serde"] }
 daedalus.workspace = true