Update README

Author: lambdalisue

README.md

@@ -1,17 +1,49 @@
-# 🐜 denops-std-deno
+# 🐜 denops_std
 
-[![deno doc](https://doc.deno.land/badge.svg)](https://doc.deno.land/https/deno.land/x/denops_std/mod.ts)
 [![deno](https://github.com/vim-denops/denops-std-deno/workflows/deno/badge.svg)](https://github.com/vim-denops/denops-std-deno/actions?query=workflow%3Adeno)
+[![deno doc](https://doc.deno.land/badge.svg)](https://doc.deno.land/https/deno.land/x/denops_std/mod.ts)
+[![deno land](http://img.shields.io/badge/available%20on-deno.land/x-lightgrey.svg?logo=deno)](https://deno.land/x/denops_std)
 
 [Deno][deno] module for [denops.vim][denops.vim]. This module is assumed to be
 used in denops plugin and the code is assumed to be called in a worker thread
 for a plugin.
 
-Note that this module focused to provide non-primitive features. See
-[denops-deno](https://github.com/vim-denops/denops-deno) for primitives.
-
 **UNDER DEVELOPMENT**
 
+By using this module, developers can write Vim/Neovim denops plugins like:
+
+```typescript
+import { ensureString, main } from "https://deno.land/x/denops_std/mod.ts";
+
+main(async ({ vim }) => {
+  vim.register({
+    async say(where: unknown): Promise<void> {
+      ensureString(where, "where");
+      const name = await vim.call("input", "Your name: ");
+      const progname = await vim.eval("v:progname");
+      const messages = [
+        `Hello ${where}`,
+        `Your name is ${name}`,
+        `This is ${progname}`,
+      ];
+      await vim.cmd(`redraw | echomsg message`, {
+        message: messages.join(". "),
+      });
+    },
+  });
+
+  await vim.execute(`
+    command! HelloWorld call denops#notify("${vim.name}", "say", ["World"])
+    command! HelloDenops call denops#notify("${vim.name}", "say", ["Denops"])
+  `);
+
+  console.log("denops plugin has loaded");
+});
+```
+
+See [denops-helloworld.vim](https://github.com/denops-helloworld.vim) for more
+details.
+
 [deno]: https://deno.land/
 [denops.vim]: https://github.com/vim-denops/denops.vim