Refine getServerState() & getServerContext() docs (#67499)

* `getServerState()` & `getServerContext()` docs: Add note about reactivity.

* Fix the code snippets

* Add note about local context

* Fix param order and function name

* Remove the namespace and use the correct functions

Co-authored-by: michalczaplinski <czapla@git.wordpress.org>
Co-authored-by: luisherranz <luisherranz@git.wordpress.org>

docs/reference-guides/interactivity-api/core-concepts/undestanding-global-state-local-context-and-derived-state.md

@@ -745,15 +745,15 @@ When using region-based navigation, it's crucial to ensure that your interactive
 
 `getServerState()` allows you to subscribe to changes in the **global state** that occur during client-side navigation. This function is analogous to `getServerContext()`, but it works with the global state instead of the local context.
 
+The `getServerState()` function returns a read-only reactive object. This means that any [callbacks](/docs/reference-guides/interactivity-api/api-reference.md#accessing-data-in-callbacks) you have defined that watch the returned object will only trigger when the value returned by the function changes. If the value remains the same, the callback will not re-trigger.
+
 Let's consider a quiz that has multiple questions. Each question is a separate page. When the user navigates to a new question, the server provides the new question and the time left to answer all the questions.
 
 ```php
-<?php
-wp_interactivity_state( 'myPlugin', array(
+<div <?php echo wp_interactivity_state( 'myPlugin', array(
 	'question' => get_question_for_page( get_the_ID() ),
 	'timeLeft' => 5 * 60, // Time to answer all the questions.
-) );
-?>
+) ); ?>>
 ```
 
 ```javascript
@@ -789,14 +789,14 @@ store( 'myPlugin', {
 
 `getServerContext()` allows you to subscribe to changes in the **local context** that occur during client-side navigation. This function is analogous to `getServerState()`, but it works with the local context instead of the global state.
 
+The `getServerContext()` function returns a read-only reactive object. This means that any [callbacks](/docs/reference-guides/interactivity-api/api-reference.md#accessing-data-in-callbacks) you have defined that watch the returned object will only trigger when the value returned by the function changes. If the value remains the same, the callback will not re-trigger.
+
 Consider a quiz that has multiple questions. Each question is a separate page. When the user navigates to a new question, the server provides the new question and the time left to answer all the questions.
 
 ```php
-<?php
-wp_interactivity_context( 'myPlugin', array(
+<div <?php echo wp_interactivity_data_wp_context( array(
 	'currentQuestion' => get_question_for_page( get_the_ID() ),
-) );
-?>
+), ); ?>>
 ```
 
 ```javascript
@@ -830,12 +830,12 @@ store( 'myPlugin', {
 
 ### When to Use
 
-Whenever you have interactive blocks that rely on global state that may change due to navigation events, ensuring consistency across different parts of your application.
+Whenever you have interactive blocks that rely on global state or local context that may change due to navigation events, ensuring consistency across different parts of your application.
 
 ### Best Practices for using `getServerState()` and `getServerContext()`
 
 -   **Read-Only References:** Both `getServerState()` and `getServerContext()` return read-only objects. You can use those objects to update the global state or local context.
--   **Callback Integration:** Incorporate these functions within your store [callbacks](/docs/reference-guides/interactivity-api/api-reference.md#accessing-data-in-callbacks) to react to state and context changes.
+-   **Callback Integration:** Incorporate these functions within your store [callbacks](/docs/reference-guides/interactivity-api/api-reference.md#accessing-data-in-callbacks) to react to state and context changes. Both `getServerState()` and `getServerContext()` return reactive objects. This means that their watch callbacks will only trigger when the value of a property changes. If the value remains the same, the callback will not re-trigger.
 
 ## Conclusion