Wire breadmon into the bread event fabric (app id mon)

After a successful hyprctl apply, publish bread.mon.applied
{ "profile": <string or null> }. BreadClient is fail-silent: if
breadd is down, apply behaves exactly as before.

Document the contract in EVENTS.md.

Cargo.lock

@@ -20,11 +20,23 @@ version = "2.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b588b76d00fde79687d7646a9b5bdf3cc0f655e0bbd080335a95d7e96f3587da"
 
+[[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",