refactor: rebuild desktop app with Tauri

Cargo.toml

@@ -0,0 +1,25 @@
+[workspace]
+members = [
+    "server",
+    "apps/desktop/src-tauri",
+    "crates/semble-core",
+    "benchmarks/semble",
+]
+resolver = "2"
+
+# Keep local Rust builds compact. Full dependency debug info and incremental
+# object caches dominate target/ in this workspace, while line tables for our
+# own crates are enough for normal backtraces and source-level debugging.
+[profile.dev]
+debug = 1
+incremental = false
+
+[profile.dev.package."*"]
+debug = 0
+
+[profile.test]
+debug = 1
+incremental = false
+
+[profile.test.package."*"]
+debug = 0