README.md MUST inform about Java & Jackarta EE support

The Readme should inform about the "peculiar" way that Logback team decide how support Java EE and Jakarta EE at same time. So users, could avoid using the wrong version and only discover why fails, finding a email on a email archive (https://www.mail-archive.com/logback-user@qos.ch/msg05119.html)

Author: Zardoz89

README.md

@@ -8,6 +8,26 @@ The Logback documentation can be found on the [project
 web-site](https://logback.qos.ch/documentation.html) as well as under
 the docs/ folder of the logback distribution.
 
+# Java EE and Jackarta EE versions
+
+Given that downstream users are likely to depend on either Java EE (in
+the javax namespace) or on Jakarta EE (in the jakarta namespace) in
+their projects, it was deemed important for logback to support both EE
+alternatives.
+
+**Version 1.3.x supports Java EE, while version 1.4.x supports Jakarta EE.** 
+The two versions are feature identical. Both versions require slf4j-api 
+version 2.0.0 or later.
+
+Both 1.3.x and 1.4.x series require the fluent-API introduced in SLF4J
+2.0.x.
+
+The 1.3.x series requires Java 8 at runtime. If you wish to build
+logback from source, you will need Java 9. Reproducible builds require
+Java 18.
+
+The 1.4.x series requires Java 11 at build time and at runtime.
+
 # Building logback
 
 Version 1.3.x requires Java 9 to compile and build.