feat: initial OpenFUT Launcher

GUI desktop app (egui/eframe) that manages the openfut-core and
openfut-bridge services with a single window.

- Dashboard: start/stop each service independently or together; live
  status indicators; quick-status for cert and hosts
- Logs: real-time stdout/stderr from both processes, colour-coded by
  level, follow mode and manual clear
- Setup: add/remove EA hostname redirects in /etc/hosts (pkexec/sudo);
  install the bridge TLS cert into the system CA store
- Config: all binary paths and env vars editable in-app; persisted to
  ~/.config/openfut-launcher/config.json

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "openfut-launcher"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+eframe = "0.29"
+egui = "0.29"
+tokio = { version = "1", features = ["full"] }
+anyhow = "1"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+dirs = "5"
+chrono = { version = "0.4", features = ["serde"] }