docs: 📝 describe the release proces (#133)

Author: zoido

README.md

@@ -87,6 +87,8 @@ await home.list_objects()
 
 ## Development
 
+Please see [RELEASE.md](RELEASE.md) for the release process.
+
 Project is managed using [Hatch](https://hatch.pypa.io/latest/).
 
 ### Testing

RELEASE.md

@@ -0,0 +1,16 @@
+# H2O Cloud Discovery Client Release Process
+
+- Releases are handled by [Release Please](https://github.com/googleapis/release-please)
+[GitHub Action](https://github.com/googleapis/release-please-action) that executes on
+  all commits to the default branch.
+- Commits to the default branch should follow [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) syntax.
+- If the default branch contains commits that lead to the increment of a version number Release Please
+  will automatically create a PR that when merged will create a new release.
+- Release PR is created by the GitHub Action bot as a draft, which means that CI checks are not automatically triggered.
+- To activate the PR non-bot maintainer needs to contribute to the PR.
+  - This can usually be done by adding an empty commit and pushing it to the PR branch.
+
+     ```sh
+      git commit --allow-empty --message "Activate release PR"
+      git push
+     ```