minor: add a new release system (#3)

# Changes

* package and release helm charts for the project
* configure a new release system based of semver
* add changelog entries via keep-a-changelog formatting
* add gitea releases

Co-authored-by: Madison Grubb <madison@elastiflow.com>
Reviewed-on: #3

README.md

@@ -77,12 +77,30 @@ docker run -p 3000:3000 kestrelos:latest
 
 ## Kubernetes (Helm)
 
+**From Gitea registry:**
 ```bash
-helm install kestrelos ./helm/kestrelos --set image.repository=your-registry/kestrelos --set image.tag=latest
+helm repo add keligrubb --username YOUR_USER --password YOUR_TOKEN https://git.keligrubb.com/api/packages/keligrubb/helm
+helm repo update
+helm install kestrelos keligrubb/kestrelos
+```
+
+**From source:**
+```bash
+helm install kestrelos ./helm/kestrelos
 ```
 
 Health: `GET /health` (overview), `GET /health/live` (liveness), `GET /health/ready` (readiness). Probes are configured in the Helm chart. Optional: enable Ingress in `helm/kestrelos/values.yaml`.
 
+## Releases
+
+Merges to `main` trigger a semver release. Use one of these prefixes in your PR title to set the version bump:
+
+- `major:` – breaking changes
+- `minor:` – new features
+- `patch:` – bug fixes, docs (default if no prefix)
+
+Example: `minor: Add map layer toggle`
+
 ## Security
 
 - Device data is validated server-side; only valid entries are returned.