This documentation change includes the following:

* Updates `nullable-getters-setters.md` to use editions syntax for the examples
* Corrects content about the string_type feature
* Corrects the currently-supported version of editions
* Adds a section about serializing messages to and from JSON to the Python tutorial
* Updated the Stricter validation for `json_name` news article to reflect changes in how it was implemented
* Rewrote the extension example in the Editions overview topic
* Updated the Non-varint Numbers section of the encoding topic
* Clarified JSON format goals and format descriptions
* Adds information about doubles and floats using IEEE 754 format to the Proto3 language guide
* Typo fix in the style guide
* Corrected the definition of the `add_foo` method in the C++ Generated Code topic
* Updates size.md to add Editions information
* Updates the Java Generated Code topic to include editions
* Minor changes to the Proto2 language guide
* Updated the Ruby Generated Code topic to include editions
* Formatting fix in the Rust Design Decisions topic
* Updated the Rust Generated Code topic to include editions
* Removes some internal-only files that we missed on an earlier push

PiperOrigin-RevId: 793776428
Change-Id: I85acb6e88d5c425b694b0aaae5873f9bee6c6487

Author: Protocol Buffer Team

content/editions/overview.md

@@ -22,7 +22,11 @@ the default behavior for the edition you've selected. You can also override your
 overrides. The [section later in this topic on lexical scoping](#scoping) goes
 into more detail on that.
 
-*The latest released edition is 2024.*
+*The latest released edition is 2023.*
+
+The examples in this topic show edition 2024 features, but edition 2024 is
+currently in **pre-release review** and is not yet recommended for production
+code.
 
 The examples in this topic show edition 2024 features, but edition 2024 is
 currently in **pre-release review** and is not yet recommended for production