feat: extract reusable dev/CI tools from GRM into devx package

Port core modules (config, exceptions, i18n, api_clients, gitea_cli),
14 CI scripts, 6 dev tools, 5 molecule tools, CLI entry point, workflows,
Makefile, tests (784 tests, 100% coverage), and documentation from GRM.

The devx package is published to the Gitea PyPI registry and consumed
by GRM, infra, and other oblachno-oss projects as a pip dependency.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

.gitea/workflows/publish.yml

@@ -0,0 +1,49 @@
+name: Publish Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  publish:
+    runs-on: docker
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Install dependencies
+        run: |
+          python3 -m pip install --break-system-packages build twine requests python-dotenv click
+          python3 -m pip install --break-system-packages -e .
+      - name: Install CI tools
+        run: |
+          export PATH="$HOME/.local/bin:$PATH"
+          python -m devx.tools.install_tools --tool git-cliff --tool tea
+      - name: Configure tea login
+        env:
+          REPO_TOKEN: ${{ secrets.REPO_TOKEN }}
+        run: |
+          export PATH="$HOME/.local/bin:$PATH"
+          tea login add --name devx --url "${{ github.server_url }}" --token "$REPO_TOKEN" || true
+          tea login default devx || true
+      - name: Build and publish release
+        env:
+          REPO_TOKEN: ${{ secrets.REPO_TOKEN }}
+          PYTHONPATH: src
+        run: |
+          export PATH="$HOME/.local/bin:$PATH"
+          python -m devx.ci.publish "${{ github.ref_name }}" "${{ github.repository }}"
+      - name: Notify on failure
+        if: failure()
+        env:
+          REPO_TOKEN: ${{ secrets.REPO_TOKEN }}
+          PYTHONPATH: src
+        run: |
+          export PATH="$HOME/.local/bin:$PATH"
+          python -m devx.ci.notify_failure \
+            --repo "${{ github.repository }}" \
+            --run-id "${{ github.run_id }}" \
+            --workflow "publish" \
+            --commit "${{ github.sha }}"