chore: Updating final Store docs for v3

markdown/dev/reference/api/store/en.md

@@ -2,26 +2,44 @@
 title: Store
 ---
 
-The **Store** object holds a simple key/value store with
-methods for storing and retrieving information.  
-A single store per pattern is shared by all pattern parts.
+A **Store** object holds a simple key/value store with methods for storing and
+retrieving data.  
+
+## Signature
+
+```js
+Store Store.extend(Array methods=[])
+```
+
+The constructor takes a single argument, an Array of methods to add to the
+store. Each entry in the array should be an array itself holding a path in
+dot notation and a method. See below for an example.
+
+## Example
+
+```js
+function myCustomMethod() {
+ // Do something clever
+}
+
+const store = new Store([
+  ["path.to.the.method", myCustomMethod ]
+])
+```  
+
+With the configuration above, you can call `store.path.to.the.method()` and it
+will run `myCustomMethod()`.
+
+## Methods
+
+A Store object exposes the following methods:
+
+<ReadMore list />
+
+## Notes
 
 A store is typically used to share information between parts. For example
 the length of the neck opening in one part can be used to calculate the
 length for the collar in another part.
 
-The `Store` object exposes the following methods:
-
-<ReadMore list />
-
-<Tip>
-
-###### The store is available as shorthand
-
-You can access the store instance from the [Part.shorthand](/reference/api/part/shorthand/) method;
-
-```js
-let { store } = part.shorthand();
-```
-
-</Tip>
+<Fixme compact>Include link to guide</Fixme>