Add API docs for HelmRelease v2

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

README.md

@@ -24,7 +24,7 @@ operator.
 * Supports `HelmChart` artifacts produced from `HelmRepository`,
   `GitRepository` and `Bucket` sources
 * Fetches artifacts produced by [source-controller][] from `HelmChart`
-  objects
+  and `OCIRepository` objects
 * Watches `HelmChart` objects for revision changes (including semver
   ranges for charts from `HelmRepository` sources)
 * Performs automated Helm actions, including Helm tests, rollbacks and
@@ -49,7 +49,7 @@ operator.
 
 ## Specifications
 
-* [API](docs/spec/v2beta2/README.md)
+* [API](docs/spec/v2/README.md)
 * [Controller](docs/spec/README.md)
 
 [source-controller]: https://github.com/fluxcd/source-controller

docs/spec/v2/README.md

@@ -0,0 +1,16 @@
+# helm.toolkit.fluxcd.io/v2
+
+This is the v2 API specification for declaratively managing Helm chart
+releases with Kubernetes manifests.
+
+## Specification
+
+- [HelmRelease CRD](helmreleases.md)
+  + [Example](helmreleases.md#example)
+  + [Writing a HelmRelease spec](helmreleases.md#writing-a-helmrelease-spec)
+  + [Working with HelmReleases](helmreleases.md#working-with-helmreleases)
+  + [HelmRelease Status](helmreleases.md#helmrelease-status)
+
+## Implementation
+
+* [helm-controller](https://github.com/fluxcd/helm-controller/)