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

.woodpecker/push.yml

@@ -3,14 +3,34 @@ when:
     branch: main
 
 steps:
-  - name: docker-build-push
+  - name: release
+    image: alpine
+    commands:
+      - apk add --no-cache git
+      - ./scripts/release.sh
+    environment:
+      GITEA_REPO_TOKEN:
+        from_secret: gitea_repo_token
+
+  - name: docker
     image: woodpeckerci/plugin-kaniko
+    depends_on: [release]
     settings:
       repo: ${CI_REPO_OWNER}/${CI_REPO_NAME}
       registry: git.keligrubb.com
-      tags: latest,${CI_COMMIT_SHA:0:7}
       username: ${CI_REPO_OWNER}
       password:
         from_secret: gitea_registry_token
       single-snapshot: true
       cleanup: true
+
+  - name: helm
+    image: alpine/helm
+    depends_on: [release]
+    environment:
+      GITEA_REGISTRY_TOKEN:
+        from_secret: gitea_registry_token
+    commands:
+      - apk add --no-cache curl
+      - helm package helm/kestrelos
+      - curl -sf -u $CI_REPO_OWNER:$GITEA_REGISTRY_TOKEN -X POST --upload-file kestrelos-*.tgz https://git.keligrubb.com/api/packages/$CI_REPO_OWNER/helm/api/charts