Added version compatibility matrix (#155)

 Added version compatibility matrix

new file: docs/versions.md

Author: nastena1606

docs/versions.md

@@ -0,0 +1,16 @@
+# Versions compatibility
+
+Below you can find the versions of software components and platforms that have been tested and are confirmed to work with each specific Operator version. Other software and platform versions might work, but we have not tested them and cannot guarantee their compatibility.
+
+## Cluster components
+
+| Operator | [MySQL :octicons-link-external-16:](https://www.percona.com/software/mysql-database/percona-server) | [Percona XtraBackup :octicons-link-external-16:](https://www.percona.com/software/mysql-database/percona-xtrabackup) | [HA Proxy :octicons-link-external-16:](https://www.haproxy.org/) | [MySQL Router :octicons-link-external-16:](https://www.mysql.com/products/enterprise/router.html) | [Orchestrator :octicons-link-external-16:](https://github.com/percona/orchestrator) | [Percona Toolkit :octicons-link-external-16:](https://www.percona.com/percona-toolkit) |
+|:--------|:--------|:---------------------------------------------------------------------------|:--------|:-----------|:-------------|:-------------------|
+|[1.0.0](ReleaseNotes/Kubernetes-Operator-for-PS-RN1.0.0.md)| 8.4.6-6.1, 8.0.43-34.1 | 8.4.0-4.1, 8.0.35-34.1 | 2.8.15 | 8.4.6-6.1, 8.0.43-34.1 | 3.2.6-18 | 3.7.0-2 |
+
+
+## Platforms
+
+| Operator | [GKE :octicons-link-external-16:](https://cloud.google.com/kubernetes-engine)         | [EKS :octicons-link-external-16:](https://aws.amazon.com)         | [Openshift :octicons-link-external-16:](https://www.redhat.com/en/technologies/cloud-computing/openshift) | [Minikube :octicons-link-external-16:](https://github.com/kubernetes/minikube)                          |
+|:--------|:------------|:------------|:------------|:--------------------|
+|[1.0.0](ReleaseNotes/Kubernetes-Operator-for-PS-RN1.0.0.md)  | 1.31 - 1.33 | 1.31 - 1.34 | 4.16 - 4.20 |  1.37.0 |

mkdocs-base.yml

@@ -247,6 +247,7 @@ nav:
         - Certified images:
             - "Percona certified images": images.md
             - "Retrieve certified images": image-query.md
+        - Version compatibility: versions.md
         - Legal:
             - "Copyright and licensing information": copyright.md
             - "Trademark policy": trademark-policy.md