docs: add Firecracker release policy document
The document describes Firecracker release planning, API support
and the Firecracker release lifetime, helping customers effectively plan
their Firecracker based operations.
@@ -76,6 +76,8 @@ New Firecracker versions are released via the GitHub repository
typically every one or two months. A history of changes is recorded in our
[changelog](CHANGELOG.md).
+The Firecracker release policy is detailed [here](docs/RELEASE_POLICY.md).
+
## Design
Firecracker's overall architecture is described in
