Support libayatana-appindicator

[saul-jb]

Debian as of Bullseye no longer includes the deprecated libappindicator libraries but instead uses libayatana-appindicator, so it would be good if the build process worked for the replacement library.

$ pnpm run package-ad4m

ad4m-launcher:package-ad4m: note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
ad4m-launcher:package-ad4m:     Built [tauri_cli::build] application at: /ad4m/target/release/ADAM Launcher
ad4m-launcher:package-ad4m: thread '<unnamed>' panicked at crates/tauri-cli/src/interface/rust.rs:1481:17:
ad4m-launcher:package-ad4m: Can't detect any appindicator library
ad4m-launcher:package-ad4m: note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
ad4m-launcher:package-ad4m: Aborted (core dumped)

[saul-jb]

It looks like the build did in fact succeed regardless, not sure why it spat that error after Finished release profile [optimized] target(s)