Add tracy profiling under a feature

Cargo.toml

@@ -10,9 +10,11 @@ edition = "2021"
 anyhow = { version = "1.0.72", features = ["backtrace"] }
 bitflags = "2.3.3"
 clap = { version = "4.3.21", features = ["derive"] }
+profiling = "1.0.9"
 smithay-drm-extras = { version = "0.1.0", path = "../smithay/smithay-drm-extras" }
 tracing = "0.1.37"
 tracing-subscriber = { version = "0.3.17", features = ["env-filter"] }
+tracy-client = { version = "0.15.2", default-features = false }
 
 [dependencies.smithay]
 git = "https://github.com/Smithay/smithay"
@@ -31,3 +33,7 @@ features = [
     "use_system_lib",
     "wayland_frontend",
 ]
+
+[features]
+profile-with-tracy = ["profiling/profile-with-tracy", "tracy-client/default"]
+