Small corrections to Javascript section (#278)

* use `add.add`, not just `add`, in Node example

in "Running a Component from JavaScript Applications (including the Browser)" section, what is exported from `./dist/transpiled/adder.js` is an `add` object and not a function.

You can see this difference in the example application at https://github.com/bytecodealliance/jco/blob/b2e8641d15dbc25a1d68b66451ab670a47a963d5/examples/components/adder/run-transpiled.js

* fix "AKA" on `reverse-string`

I'm not 100% sure of this, but I think this full `example:string-reverse/reverse.reverse-string` path is meant to break down as:
* package: `example:string-reverse`
* interface: `reverse`
* function name: `reverse-string`

If so, then the first part should be `example:string-reverse` and not `example:reverse-string`

Author: mikemoraned

component-model/src/language-support/javascript.md

@@ -215,7 +215,7 @@ To use this component from [NodeJS][nodejs], you can write code like the followi
 ```mjs
 import { add } from "./dist/transpiled/adder.js";
 
-console.log("1 + 2 = " + add(1, 2));
+console.log("1 + 2 = " + add.add(1, 2));
 ```
 
 You can execute the JavaScript module with `node` directly:
@@ -281,7 +281,7 @@ As a slightly deeper crash course on [WIT][wit], here's what the above code desc
 - This WIT file corresponds to version `0.1.0` of `example:string-reverse` package
 - We've defined an interface called `reverse` which contains *one* function called `reverse-string`
 - We specify that the `reverse` interface has existed *since* the `0.1.0` version
-- The `reverse-string` function (AKA. `example:reverse-string/reverse.reverse-string`) takes a string and returns a string
+- The `reverse-string` function (AKA. `example:string-reverse/reverse.reverse-string`) takes a string and returns a string
 - We've defined a `world` called `string-reverse` which exports the functionality provided by the `reverse` interface
 
 > [!WARNING]