update: add KeySequence creation patterns

README.md

@@ -24,6 +24,34 @@ differently than a regular runnable example:
 
 The next section describes the runnable examples that come with the crate.
 
+## KeySequence creation patterns
+
+### Create a KeySequence entity and component.
+
+```rust
+
+commands.add(KeySequence::new(…));
+```
+
+### Create a KeySequence component and add it to an entity.
+
+```rust
+commands.entity(id).add(KeySequence::new(…));
+// OR
+commands.spawn(…)
+    .add(KeySequence::new(…));
+```
+
+### Create a KeySequence component but don't add it to anything
+
+```rust
+commands.add(|&mut world| {
+    let builder = KeySequence::new(…);
+    let key_sequence = builder.build(world);
+    // And then put it somewhere?
+});
+```
+
 ## Run a System on a Key Sequence
 
 Runs a system whenever the user presses the key sequence `H I` or "hi" within a