chore(login): migrate nextjs login to monorepo (#10134)

# Which Problems Are Solved

We move the login code to the zitadel repo.

# How the Problems Are Solved

The login repo is added to ./login as a git subtree pulled from the
dockerize-ci branch.
Apart from the login code, this PR contains the changes from #10116

# Additional Context

- Closes https://github.com/zitadel/typescript/issues/474
- Also merges #10116  
- Merging is blocked by failing check because of:
- https://github.com/zitadel/zitadel/pull/10134#issuecomment-3012086106

---------

Co-authored-by: Max Peintner <[email protected]>
Co-authored-by: Max Peintner <[email protected]>
Co-authored-by: Florian Forster <[email protected]>

login/.github/workflows/test.yml

@@ -0,0 +1,67 @@
+name: Quality
+on:
+  pull_request:
+  workflow_dispatch:
+    inputs:
+      ignore-run-cache:
+        description: 'Whether to ignore the run cache'
+        required: false
+        default: true
+      ref-tag:
+        description: 'overwrite the DOCKER_METADATA_OUTPUT_VERSION environment variable used by the make file'
+        required: false
+        default: ''
+jobs:
+  quality:
+    name: Ensure Quality
+    if: github.event_name == 'workflow_dispatch' ||
+      (github.event_name == 'pull_request' && github.repository_id != '622995060')
+    runs-on: ubuntu-22.04
+    timeout-minutes: 30
+    permissions:
+      contents: read # We only need read access to the repository contents
+      actions: write # We need write access to the actions cache
+    env:
+      CACHE_DIR: /tmp/login-run-caches
+    # Only run this job on workflow_dispatch or pushes to forks
+    steps:
+      - uses: actions/checkout@v4
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            ghcr.io/zitadel/login
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+      - name: Set up Buildx
+        uses: docker/setup-buildx-action@v3
+      # Only with correctly restored build cache layers, the run caches work as expected.
+      # To restore docker build layer caches, extend the docker-bake.hcl to use the cache-from and cache-to options.
+      # https://docs.docker.com/build/ci/github-actions/cache/
+      # Alternatively, you can use a self-hosted runner or a third-party builder that restores build layer caches out-of-the-box, like https://depot.dev/
+      - name: Restore Run Caches
+        uses: actions/cache/restore@v4
+        id: run-caches-restore
+        with:
+          path: ${{ env.CACHE_DIR }}
+          key: ${{ runner.os }}-login-run-caches-${{github.ref_name}}-${{ github.sha }}-${{github.run_attempt}}
+          restore-keys: |
+            ${{ runner.os }}-login-run-caches-${{github.ref_name}}-${{ github.sha }}-
+            ${{ runner.os }}-login-run-caches-${{github.ref_name}}-
+            ${{ runner.os }}-login-run-caches-
+      - run: make login_quality
+        env:
+          IGNORE_RUN_CACHE: ${{ github.event.inputs.ignore-run-cache == 'true' }}
+          DOCKER_METADATA_OUTPUT_VERSION: ${{ github.event.inputs.ref-tag || env.DOCKER_METADATA_OUTPUT_VERSION || steps.meta.outputs.version }}
+      - name: Save Run Caches
+        uses: actions/cache/save@v4
+        with:
+          path: ${{ env.CACHE_DIR }}
+          key: ${{ steps.run-caches-restore.outputs.cache-primary-key }}
+        if: always()