[jythonscripting] Add a note not to use jython (#15623)

* [jythonscripting] Add a note not to use jython
* [jythonscripting] Mark as deprecated

---------

Signed-off-by: Jimmy Tanagra <jcode@tanagra.id.au>

bundles/org.openhab.automation.jythonscripting/README.md

@@ -1,4 +1,11 @@
-# Jython Scripting
+# Jython Scripting (DEPRECATED)
+
+::: tip Note:
+Currently, the development of Jython stopped at version 2.7 with no definite timeline to support Python 3.x.
+The 3rd party openHAB helper library for Jython is also no longer maintained.
+We would not recommend using Jython scripting at this point in time.
+For alternatives, check out the list of other supported [automation add-ons](https://www.openhab.org/addons/#automation).
+:::
 
 This add-on provides [Jython](https://www.jython.org/) 2.7.2 that can be used as a scripting language within automation rules and which eliminates the need to download Jython and create `EXTRA_JAVA_OPTS` entries for `bootclasspath`, `python.home` and `python.path`.
 

bundles/org.openhab.automation.jythonscripting/src/main/resources/OH-INF/addon/addon.xml

@@ -4,7 +4,7 @@
 	xsi:schemaLocation="https://openhab.org/schemas/addon/v1.0.0 https://openhab.org/schemas/addon-1.0.0.xsd">
 
 	<type>automation</type>
-	<name>Jython Scripting</name>
+	<name>Jython Scripting (DEPRECATED)</name>
 	<description>This adds a Jython script engine.</description>
 	<connection>none</connection>