classref: Add property overview and setter/getter like in editor docs

Output from godotengine/godot#22013.
Fixes #1729.

classes/class_thread.rst

@@ -8,6 +8,7 @@ Thread
 ======
 
 **Inherits:** :ref:`Reference<class_Reference>` **<** :ref:`Object<class_Object>`
+
 **Category:** Core
 
 Brief Description
@@ -33,13 +34,12 @@ Enumerations
 
   .. _enum_Thread_Priority:
 
-enum **Priority**
+enum **Priority**:
 
 - **PRIORITY_LOW** = **0**
 - **PRIORITY_NORMAL** = **1**
 - **PRIORITY_HIGH** = **2**
 
-
 Description
 -----------
 
@@ -48,19 +48,19 @@ A unit of execution in a process. Can run methods on :ref:`Object<class_Object>`
 Method Descriptions
 -------------------
 
-.. _class_Thread_get_id:
+  .. _class_Thread_get_id:
 
 - :ref:`String<class_String>` **get_id** **(** **)** const
 
 Returns the current ``Thread``\ s id, uniquely identifying it among all threads.
 
-.. _class_Thread_is_active:
+  .. _class_Thread_is_active:
 
 - :ref:`bool<class_bool>` **is_active** **(** **)** const
 
 Returns true if this ``Thread`` is currently active. An active ``Thread`` cannot start work on a new method but can be joined with :ref:`wait_to_finish<class_Thread_wait_to_finish>`.
 
-.. _class_Thread_start:
+  .. _class_Thread_start:
 
 - :ref:`Error<enum_@GlobalScope_Error>` **start** **(** :ref:`Object<class_Object>` instance, :ref:`String<class_String>` method, :ref:`Variant<class_Variant>` userdata=null, :ref:`int<class_int>` priority=1 **)**
 
@@ -68,10 +68,9 @@ Starts a new ``Thread`` that runs "method" on object "instance" with "userdata"
 
 Returns OK on success, or ERR_CANT_CREATE on failure.
 
-.. _class_Thread_wait_to_finish:
+  .. _class_Thread_wait_to_finish:
 
 - :ref:`Variant<class_Variant>` **wait_to_finish** **(** **)**
 
 Joins the ``Thread`` and waits for it to finish. Returns what the method called returned.
 
-