Align workflows with htpasswd standard pattern

- Add hadolint, test, and build jobs in dependency chain matching htpasswd
- Update build context: ./pkg, file: pkg/Dockerfile
- Update image to jcabillot/send with SA_TOKEN_ACTION_PUSH_TAGS
- Add continue-on-error on hadolint jobs, setup-buildx in test steps
- Add version comments on action SHAs
- Use fetch-depth: 0 for tag-related checkouts
- Configure git auth URL with SA_TOKEN_ACTION_PUSH_TAGS for tag creation

Closes: fix/workflow-standard

.gitea/workflows/pr.yaml

@@ -5,20 +5,18 @@ on:
     branches: [master]
 
 jobs:
-  lint:
+  hadolint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
-      - name: Hadolint
-        uses: hadolint/hadolint-action@2332a7b74a6de0dda2e2221d575162eba76ba5e5
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
+      - uses: hadolint/hadolint-action@2332a7b74a6de0dda2e2221d575162eba76ba5e5 # v3.3.0
         with:
           dockerfile: pkg/Dockerfile
 
-  test:
+  build-test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
-      - name: Build image
-        run: docker build -f pkg/Dockerfile -t ci-image:${{ github.sha }} .
-      - name: Run tests
-        run: bash tests/test.sh ci-image:${{ github.sha }}
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
+      - uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4
+      - run: docker build -f pkg/Dockerfile -t ci-image:${{ github.sha }} ./pkg
+      - run: bash tests/test.sh ci-image:${{ github.sha }}