chore(ci): migrate to GitTea actions

.gitea/workflows/generate-readme.yaml

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+name: Generate README
+
+on:
+  pull_request:
+    paths: [ "README.md", "values.yaml" ]
+    types: [ "opened", "reopened", "synchronize" ]
+  push:
+    branches:
+    - '**'
+    paths: [ "README.md", "values.yaml" ]
+    tags-ignore:
+    - '**'
+  workflow_dispatch: {}
+
+jobs:
+  generate-parameters:
+    container:
+      image: docker.io/library/node:24.1.0-alpine
+    runs-on:
+    - ubuntu-latest
+    steps:
+    - name: Install tooling
+      run: |
+        apk update
+        apk add git npm
+    - uses: actions/checkout@v4.2.2
+    - name: Generate parameter section in README
+      run: |
+        npm install
+        npm run readme:parameters
+    - name: Compare diff
+      run: git diff --exit-code --name-only README.md

.gitea/workflows/helm.yaml

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+name: Helm
+
+on:
+  pull_request:
+    types: [ "opened", "reopened", "synchronize" ]
+  push:
+    branches:
+    - '**'
+    tags-ignore:
+    - '**'
+  workflow_dispatch: {}
+
+jobs:
+  helm-lint:
+    container:
+      image: docker.io/volkerraschek/helm:3.18.2
+    runs-on:
+    - ubuntu-latest
+    steps:
+    - name: Install tooling
+      run: |
+        apk update
+        apk add git npm
+    - uses: actions/checkout@v4.2.2
+    - name: Lint helm files
+      run: |
+        helm lint --values values.yaml .
+
+  helm-unittest:
+    container:
+      image: docker.io/volkerraschek/helm:3.18.2
+    runs-on:
+    - ubuntu-latest
+    steps:
+    - name: Install tooling
+      run: |
+        apk update
+        apk add git npm
+    - uses: actions/checkout@v4.2.2
+    - name: Unittest
+      run: |
+        helm unittest --strict --file 'unittests/**/*.yaml' ./

.gitea/workflows/markdown-linters.yaml

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+name: Markdown linter
+
+on:
+  pull_request:
+    paths: [ "**/*.md" ]
+    types: [ "opened", "reopened", "synchronize" ]
+  push:
+    branches:
+    - '**'
+    paths: [ "**/*.md" ]
+    tags-ignore:
+    - '**'
+  workflow_dispatch: {}
+
+jobs:
+  markdown-link-checker:
+    container:
+      image: docker.io/library/node:24.1.0-alpine
+    runs-on:
+    - ubuntu-latest
+    steps:
+    - name: Install tooling
+      run: |
+        apk update
+        apk add git npm
+    - uses: actions/checkout@v4.2.2
+    - name: Verify links in markdown files
+      run: |
+        npm install
+        npm run readme:link
+
+  markdown-lint:
+    container:
+      image: docker.io/library/node:24.1.0-alpine
+    runs-on:
+    - ubuntu-latest
+    steps:
+    - name: Install tooling
+      run: |
+        apk update
+        apk add git
+    - uses: actions/checkout@v4.2.2
+    - name: Lint markdown files
+      run: |
+        npm install
+        npm run readme:lint

.gitea/workflows/release.yaml

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+name: Release
+
+on:
+  push:
+    tags:
+    - "**"
+
+jobs:
+  publish-chart:
+    container:
+      image: docker.io/volkerraschek/helm:3.18.2
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install tooling
+        run: |
+          apk update
+          apk add git npm yq
+
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Add Artifacthub.io annotations
+        run: |
+          NEW_TAG="$(git tag --sort=-version:refname | head -n 1)"
+          OLD_TAG="$(git tag --sort=-version:refname | head -n 2 | tail -n 1)"
+          .gitea/scripts/add-annotations.sh "${OLD_TAG}" "${NEW_TAG}"
+
+      - name: Package chart
+        env:
+          CHARTMUSEUM_PASSWORD: ${{ secrets.CHARTMUSEUM_PASSWORD }}
+          CHARTMUSEUM_REPOSITORY: ${{ vars.CHARTMUSEUM_REPOSITORY }}
+          CHARTMUSEUM_USERNAME: ${{ secrets.CHARTMUSEUM_USERNAME }}
+          CHARTMUSEUM_HOSTNAME: ${{ vars.CHARTMUSEUM_HOSTNAME }}
+
+          GITEA_PACKAGE_REGISTRY_TOKEN: ${{ secrets.GIT_CRYPTIC_SYSTEMS_PACKAGE_REGISTRY_TOKEN }}
+          GITEA_SERVER_URL: ${{ github.server_url }}
+        run: |
+          PACKAGE_VERSION=${GITHUB_REF#refs/tags/}
+          REPOSITORY_NAME=$(echo ${GITHUB_REPOSITORY} | cut -d '/' -f 2)
+          REPOSITORY_OWNER=$(echo ${GITHUB_REPOSITORY} | cut -d '/' -f 1)
+
+          helm dependency build
+          helm package --version "${PACKAGE_VERSION}" ./
+
+          # chart-museum
+          helm repo add --username ${CHARTMUSEUM_USERNAME} --password ${CHARTMUSEUM_PASSWORD} chartmuseum https://${CHARTMUSEUM_HOSTNAME}/${CHARTMUSEUM_REPOSITORY}
+          helm cm-push ${REPOSITORY_NAME}-${PACKAGE_VERSION}.tgz chartmuseum
+          helm repo remove chartmuseum
+
+          # gitea
+          helm repo add --username ${REPOSITORY_OWNER} --password ${GITEA_PACKAGE_REGISTRY_TOKEN} gitea ${GITEA_SERVER_URL}/api/packages/${REPOSITORY_OWNER}/helm
+          helm cm-push ${REPOSITORY_NAME}-${PACKAGE_VERSION}.tgz gitea
+          helm repo remove gitea