feat: add http examples (#3003)

![Screenshot 2024-10-04 at 2 12
42 PM](https://github.com/user-attachments/assets/29541dd2-8d98-488a-ad6f-8cc18d33cace)
![Screenshot 2024-10-04 at 2 14
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examples/go/http/ftl.toml

@@ -0,0 +1,2 @@
+module = "http"
+language = "go"

examples/go/http/go.mod

@@ -0,0 +1,49 @@
+module ftl/http
+
+go 1.23.0
+
+replace github.com/TBD54566975/ftl => ../../..
+
+require github.com/TBD54566975/ftl v0.0.0-00010101000000-000000000000
+
+require (
+	connectrpc.com/connect v1.16.2 // indirect
+	connectrpc.com/grpcreflect v1.2.0 // indirect
+	connectrpc.com/otelconnect v0.7.1 // indirect
+	github.com/XSAM/otelsql v0.34.0 // indirect
+	github.com/alecthomas/atomic v0.1.0-alpha2 // indirect
+	github.com/alecthomas/concurrency v0.0.2 // indirect
+	github.com/alecthomas/participle/v2 v2.1.1 // indirect
+	github.com/alecthomas/types v0.16.0 // indirect
+	github.com/alessio/shellescape v1.4.2 // indirect
+	github.com/benbjohnson/clock v1.3.5 // indirect
+	github.com/danieljoos/wincred v1.2.0 // indirect
+	github.com/deckarep/golang-set/v2 v2.6.0 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/godbus/dbus/v5 v5.1.0 // indirect
+	github.com/hashicorp/cronexpr v1.1.2 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/jackc/pgx/v5 v5.7.1 // indirect
+	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/jpillora/backoff v1.0.0 // indirect
+	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/multiformats/go-base36 v0.2.0 // indirect
+	github.com/puzpuzpuz/xsync/v3 v3.4.0 // indirect
+	github.com/swaggest/jsonschema-go v0.3.72 // indirect
+	github.com/swaggest/refl v1.3.0 // indirect
+	github.com/zalando/go-keyring v0.2.5 // indirect
+	go.opentelemetry.io/otel v1.30.0 // indirect
+	go.opentelemetry.io/otel/metric v1.30.0 // indirect
+	go.opentelemetry.io/otel/trace v1.30.0 // indirect
+	golang.org/x/crypto v0.27.0 // indirect
+	golang.org/x/exp v0.0.0-20240909161429-701f63a606c0 // indirect
+	golang.org/x/mod v0.21.0 // indirect
+	golang.org/x/net v0.29.0 // indirect
+	golang.org/x/sync v0.8.0 // indirect
+	golang.org/x/sys v0.25.0 // indirect
+	golang.org/x/text v0.18.0 // indirect
+	google.golang.org/protobuf v1.34.2 // indirect
+)