[Docs] Add project status/evolution section (#415)

Resolves #412

Author: onobc

README.adoc

@@ -6,6 +6,8 @@ Spring Pulsar provides a basic Spring-friendly API for developing https://pulsar
 
 **#TIP#**: Most of the ideas in this project are borrowed from the Spring for Apache Kafka project, thus a familiarity with it would help.
 
+include::spring-pulsar-docs/src/main/asciidoc/project-state.adoc[leveloffset=+1]
+
 == Getting Started
 The {docs}/html/[reference documentation] includes a {docs}/html/#quick-tourhtml[quick tour] section.
 

spring-pulsar-docs/src/main/asciidoc/intro.adoc

@@ -4,6 +4,8 @@ This project provides a basic Spring-friendly API for developing https://pulsar.
 On a very high level, Spring for Apache Pulsar provides a `PulsarTemplate` for publishing to a Pulsar topic and a `PulsarListener` annotation for consuming from a Pulsar topic.
 In addition, it also provides various convenience APIs for Spring developers to ramp up their development journey into Apache Pulsar.
 
+include::project-state.adoc[leveloffset=+1]
+
 == Supported Versions
 
 The supported versions for the underlying libraries required by the framework are as follows:
@@ -34,6 +36,8 @@ The supported versions for the underlying libraries required by the framework ar
 
 NOTE: The **Version Used** is the version of the library targeted by Spring Pulsar  {spring-pulsar-version} (the version of the framework this reference guide belongs to).
 
+Details for other versions and compatibility can be found in the <<version-compatibility.adoc#appendix.version-compatibility,appendix>>.
+
 == Building the Project
 If you have cloned the project locally, follow these steps to build the project from the source code.
 

spring-pulsar-docs/src/main/asciidoc/project-state.adoc

@@ -0,0 +1,21 @@
+= Project Status
+While the code and functionality of the framework is thoroughly tested and ready for production, the project is in a bit of flux while transitioning from experimental GA (`0.2.x`) to GA (`1.0.0`).
+
+The evolution of the project (by version) is as follows:
+
+== Version 0.2.x
+All components (`the core + Spring Boot autoconfiguration + Spring Cloud Stream binder`) reside in the `spring-pulsar` Github repository.
+
+This is considered an "experimental" GA, defined as:
+
+- code and functionality is production ready, but decision has not been made to support the project permanently
+- available on Maven Central using a major version of `0` to indicate its nature
+
+== Version 1.0.x
+This is the "full" GA and the components are split as follows (in-progress):
+
+- the core stays in the `spring-pulsar` repo (`main` branch)
+- the autoconfiguration moves to the Spring Boot project (targeting Spring Boot `3.2.0`)
+- the binder moves to the Spring Cloud Stream project (targeting SCSt `4.1.0`)
+
+NOTE: Until the GA release, the recommended version of the framework is `0.2.x`.

spring-pulsar-docs/src/main/asciidoc/version-compatibility.adoc

@@ -21,7 +21,10 @@ The following is the compatibility matrix:
 | 17+
 |===
 
+[NOTE]
+====
+In version `1.0.0` the auto-configuration moved into Spring Boot `3.2.x` and therefore `3.2.x` is the minimum Spring Boot version supported when using version `1.0.x` of the framework.
 
-NOTE: In version `1.0.0` the auto-configuration moved into Spring Boot `3.2.x` and therefore `3.2.x` is the minimum Spring Boot version supported when using version `1.0.x` of the framework.
-Prior to version `1.0.0`, the auto-configuration support exists in the framework itself.
+However, prior to version `1.0.0`, the auto-configuration support exists in the framework itself.
 ^**(*)**^This makes it theoretically possible to use later versions of Spring Boot besides `3.0.x` which it is tested against and guaranteed to work with. In other words, it may work with `3.1.x` but it has not been tested against it.
+====