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.lock

@@ -82,11 +82,23 @@ version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2032f911046de80f0a198e0901378627c33f59ea0ac00e363d481118bd70a53"
 
+[[package]]
+name = "bread-shared"
+version = "0.7.0"
+source = "git+https://git.breadway.dev/Breadway/bread?tag=v0.7.0#22e34e2cf2202305d7960759dfccb54dc79f948b"
+dependencies = [
+ "dirs",
+ "serde",
+ "serde_json",
+ "toml",
+]
+
 [[package]]
 name = "bread-utils"
 version = "0.3.1"
 source = "git+https://git.breadway.dev/Breadway/bread-ecosystem?tag=v0.7.1#db2fa3c4b4c1e6933bc5cf62a236d05972fdc886"
 dependencies = [
+ "bread-shared",
  "dirs",
  "serde",
  "serde_json",