Merge pull request #62 from domaframework/docs/version

Add an explanation regarding the major versions

Author: nakamura-to

README.md

@@ -54,8 +54,34 @@ kapt {
 }
 ```
 
-Example build.gradle
---------------------
+Example build.gradle.kts
+------------------------
 
 - Java: https://github.com/domaframework/simple-examples/blob/master/build.gradle.kts
 - Kotlin: https://github.com/domaframework/kotlin-sample/blob/master/build.gradle.kts
+
+Major versions
+---------------------
+
+### Status and Repository
+
+| Version               | Status          | Repository                                                                                 | Branch |
+|-----------------------|-----------------|--------------------------------------------------------------------------------------------|--------|
+| Doma Compile Plugin 2 | limited-support | [domaframework/doma-compile-plugin](https://github.com/domaframework/doma-compile-plugin/) | 2.x    |
+| Doma Compile Plugin 3 | stable          | [domaframework/doma-compile-plugin](https://github.com/domaframework/doma-compile-plugin/) | master |
+
+### Compatibility matrix
+
+The supported versions of Doma:
+
+|                       | Doma 2 | Doma 3 |
+|-----------------------|--------|--------|
+| Doma Compile Plugin 2 | v      |        |
+| Doma Compile Plugin 3 |        | v      |
+
+The minimum supported versions of Java:
+
+|                       | Java 8 | Java 17 |
+|-----------------------|--------|---------|
+| Doma Compile Plugin 2 | v      |         |
+| Doma Compile Plugin 3 |        | v       |