chore: bootstrap agent-notify Go project

Co-authored-by: Cursor <cursoragent@cursor.com>

Makefile

@@ -0,0 +1,11 @@
+.PHONY: build test install
+BINARY := agent-notify
+
+build:
+	go build -o bin/$(BINARY) ./cmd/agent-notify
+
+test:
+	go test ./...
+
+install: build
+	install -m 755 bin/$(BINARY) $(HOME)/.local/bin/$(BINARY)

cmd/agent-notify/main.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		printUsage()
+		os.Exit(1)
+	}
+	switch os.Args[1] {
+	case "send", "hook", "install", "test", "doctor", "help", "-h", "--help":
+		fmt.Fprintf(os.Stderr, "agent-notify: %s not implemented yet\n", os.Args[1])
+		os.Exit(1)
+	default:
+		printUsage()
+		os.Exit(1)
+	}
+}
+
+func printUsage() {
+	fmt.Fprint(os.Stderr, `Usage: agent-notify <command>
+Commands:
+  send     Send a notification
+  hook     Agent hook entrypoint
+  install  Install hook configs
+  test     Send test notification
+  doctor   Check environment
+`)
+}

go.mod

@@ -0,0 +1,3 @@
+module github.com/longbin/agent-notify
+
+go 1.22.2