add multiple-handlers example

_examples/multiple-handlers/.gitignore

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+build
+node_modules
+.wrangler

_examples/multiple-handlers/Makefile

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+.PHONY: dev
+dev:
+	wrangler dev --test-scheduled
+
+.PHONY: build
+build:
+	go run ../../cmd/workers-assets-gen
+	tinygo build -o ./build/app.wasm -target wasm -no-debug ./...
+
+.PHONY: deploy
+deploy:
+	wrangler deploy

_examples/multiple-handlers/README.md

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+# multiple-handlers
+
+* This example shows how to use multiple handlers in a single worker.
+
+## Development
+
+### Requirements
+
+This project requires these tools to be installed globally.
+
+* wrangler
+* tinygo
+
+### Commands
+
+```
+make dev     # run dev server
+make build   # build Go Wasm binary
+make deploy # deploy worker
+```
+
+#### Testing cron schedule
+
+* With curl command below, you can test the cron schedule.
+  - see: https://developers.cloudflare.com/workers/runtime-apis/handlers/scheduled/#background
+
+```
+curl "http://localhost:8787/__scheduled?cron=*+*+*+*+*"
+```

_examples/multiple-handlers/go.mod

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+module github.com/syumai/workers/_examples/multiple-handlers
+
+go 1.21.3
+
+require github.com/syumai/workers v0.0.0
+
+replace github.com/syumai/workers => ../../

_examples/multiple-handlers/main.go

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+package main
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+
+	"github.com/syumai/workers"
+	"github.com/syumai/workers/cloudflare/cron"
+)
+
+func main() {
+	handler := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		fmt.Fprint(w, "Hello, world!")
+	})
+
+	task := func(ctx context.Context) error {
+		e, err := cron.NewEvent(ctx)
+		if err != nil {
+			return err
+		}
+		fmt.Println(e.ScheduledTime.Unix())
+		return nil
+	}
+
+	// set up the worker
+	workers.ServeNonBlock(handler)
+	cron.ScheduleTaskNonBlock(task)
+
+	// send a ready signal to the runtime
+	workers.Ready()
+
+	// block until the handler or task is done
+	select {
+	case <-workers.Done():
+	case <-cron.Done():
+	}
+}

_examples/multiple-handlers/wrangler.toml

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+name = "multiple-handlers"
+main = "./build/worker.mjs"
+compatibility_date = "2023-02-24"
+workers_dev = false
+
+[triggers]
+crons = ["* * * * *"]
+
+[build]
+command = "make build"