feat(examples): add hello_world, update r/demo/event

examples/gno.land/r/demo/emit/emit.gno

@@ -0,0 +1,12 @@
+// Package emit demonstrates how to use the std.Emit() function
+// to emit Gno events that can be used to track data changes off-chain.
+// std.Emit is variadic; apart from the event name, it can take in any number of key-value pairs to emit.
+package emit
+
+import (
+	"std"
+)
+
+func Emit(value string) {
+	std.Emit("EventName", "key", value)
+}

examples/gno.land/r/demo/emit/gno.mod

@@ -0,0 +1 @@
+module gno.land/r/demo/emit

examples/gno.land/r/demo/event/z1_filetest.gno → examples/gno.land/r/demo/emit/z1_filetest.gno

@@ -1,34 +1,34 @@
 package main
 
-import "gno.land/r/demo/event"
+import "gno.land/r/demo/emit"
 
 func main() {
-	event.Emit("foo")
-	event.Emit("bar")
+	emit.Emit("foo")
+	emit.Emit("bar")
 }
 
 // Events:
 // [
 //   {
-//     "type": "TAG",
+//     "type": "EventName",
 //     "attrs": [
 //       {
 //         "key": "key",
 //         "value": "foo"
 //       }
 //     ],
-//     "pkg_path": "gno.land/r/demo/event",
+//     "pkg_path": "gno.land/r/demo/emit",
 //     "func": "Emit"
 //   },
 //   {
-//     "type": "TAG",
+//     "type": "EventName",
 //     "attrs": [
 //       {
 //         "key": "key",
 //         "value": "bar"
 //       }
 //     ],
-//     "pkg_path": "gno.land/r/demo/event",
+//     "pkg_path": "gno.land/r/demo/emit",
 //     "func": "Emit"
 //   }
 // ]

examples/gno.land/r/demo/hello_world/gno.mod

@@ -0,0 +1 @@
+module gno.land/r/demo/hello_world

examples/gno.land/r/demo/hello_world/hello.gno

@@ -0,0 +1,18 @@
+// Package hello_world demonstrates the usage of the Render() function.
+// Render() can be called via the vm/qrender ABCI query off-chain to retrieve
+// realm state or any other custom data defined by the realm developer.
+// The vm/qrender query allows for additional data to be passed in with the call
+// which can be utilized as the path argument to the Render() function.
+// This allows developers to create different "renders" of their realms
+// depending on the data which is passed in, such as pagination, admin dashboards, and more.
+// Check out other example realms and packages for more advanced use-cases, such as
+// r/gnoland/blog, r/gnoland/events, r/demo/hof, etc.
+package hello_world
+
+func Render(path string) string {
+	if path == "" {
+		return "# Hello, 世界！"
+	}
+
+	return "# Hello, " + path + "!"
+}