F: add incoming property example

_examples/incoming/.gitignore

@@ -0,0 +1,3 @@
+build
+node_modules
+.wrangler

_examples/incoming/Makefile

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+.PHONY: dev
+dev:
+	wrangler dev
+
+.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/incoming/go.mod

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

_examples/incoming/go.sum

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+github.com/syumai/workers v0.1.0 h1:z5QfQR2X+PCKzom7RodpI5J4D5YF7NT7Qwzb9AM9dgY=
+github.com/syumai/workers v0.1.0/go.mod h1:alXIDhTyeTwSzh0ZgQ3cb9HQPyyYfIejupE4Z3efr14=

_examples/incoming/main.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/syumai/workers"
+	"github.com/syumai/workers/cloudflare/incoming"
+)
+
+func main() {
+	handler := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		p := incoming.NewProperties(req.Context())
+
+		buf, _ := json.Marshal(p)
+		fmt.Fprintf(w, "%s", string(buf))
+	})
+	workers.Serve(handler)
+}

_examples/incoming/wrangler.toml

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+name = "incoming"
+main = "./build/worker.mjs"
+compatibility_date = "2022-05-13"
+compatibility_flags = [
+    "streams_enable_constructors"
+]
+
+[build]
+command = "make build"