docs: add crates.io and jsr badges (#714)

Author: dsherret

README.md

@@ -1,5 +1,8 @@
 # `deno_doc`
 
+[![](https://img.shields.io/crates/v/deno_doc.svg)](https://crates.io/crates/deno_doc)
+[![JSR](https://jsr.io/badges/@deno/doc)](https://jsr.io/@deno/doc)
+
 A Rust crate to generate documentation for JavaScript and TypeScript modules.
 
 This crate powers

js/README.md

@@ -1,15 +1,19 @@
 # `deno_doc`
 
 This repository includes a compiled version of the Rust crate as Web Assembly
-and exposes an interface which is available via the `mod.ts` and can be imported
-like this:
+and exposes an interface which is available via the `mod.ts`.
 
-```ts
-import { doc } from "jsr:@deno/doc@{VERSION}";
+Install:
+
+```sh
+deno add jsr:@deno/doc
 ```
 
-Where `{VERSION}` should be substituted with the specific version you want to
-use.
+Use:
+
+```ts
+import { doc } from "@deno/doc";
+```
 
 ## `doc()`
 
@@ -21,7 +25,7 @@ A minimal example of using `doc()` and printing out some information about a
 function:
 
 ```ts
-import { doc } from "jsr:@deno/doc@{VERSION}";
+import { doc } from "@deno/doc";
 
 const colorsDoc = await doc("https://deno.land/std/fmt/colors.ts");