Wire breadshot into the bread event bus (app id shot)

Emit bread.shot.captured after a successful grim/wl-copy capture.
Fail-silent when breadd is down. No command verbs — breadshot is a
one-shot CLI; Lua workflows should bread.exec("breadshot …").

Cargo.toml

@@ -16,7 +16,7 @@ serde_json = "1"
 toml = "0.8"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
-bread-utils = { git = "https://git.breadway.dev/Breadway/bread-ecosystem", tag = "v0.7.1" }
+bread-utils = { git = "https://git.breadway.dev/Breadway/bread-ecosystem", tag = "v0.7.1", features = ["bread-client"] }
 
 [profile.release]
 lto = "thin"