Add asf-yaml and basic community files

Author: tuhaihe

.asf.yaml

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+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+github:
+  description: DevOps and Release for Apache Cloudberry (Incubating)
+  homepage: https://cloudberry.apache.org
+  labels:
+    - mpp
+    - big-data
+    - data-warehouse
+    - data-analysis
+    - olap
+    - distributed-database
+    - database
+    - postgres
+    - postgresql
+    - greenplum
+    - cloudberry
+    - ai
+    - devops
+  features:
+    # Enable wiki for documentation
+    wiki: false
+    # Enable issues management
+    issues: true
+    # Enable projects for project management boards
+    projects: false
+  enabled_merge_buttons:
+    # enable squash button:
+    squash: true
+    # disable merge button:
+    merge: false
+    # enable rebase button:
+    rebase: true
+  protected_branches:
+    main:
+      required_status_checks:
+        # strict means "Require branches to be up to date before merging".
+        strict: true
+      required_pull_request_reviews:
+        dismiss_stale_reviews: true
+        required_approving_review_count: 1
+      # squash or rebase must be allowed in the repo for this setting to be set to true.
+      required_linear_history: true
+
+      required_signatures: false
+
+      # requires all conversations to be resolved before merging is possible
+      required_conversation_resolution: true
+  del_branch_on_merge: true
+  dependabot_alerts: true
+  dependabot_updates: false
+  protected_tags:
+    - "[0-9]*.*"
+notifications:
+  commits: [email protected]
+  issues: [email protected]
+  pullrequests: [email protected]
+  pullrequests_bot_dependabot: [email protected]

CONTRIBUTING.md

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+Apache Cloudberry welcomes contributions from anyone, new and
+experienced! We appreciate your interest in contributing. This guide
+will help you get started with the contribution.
+
+## Code of Conduct
+
+Everyone who participates in Cloudberry, either as a user or a
+contributor, is obliged to follow the ASF Code of Conduct.
+
+## GitHub Contribution Workflow
+
+1. Fork this repo to your own GitHub account.
+2. Clone down the repo to your local system.
+
+```
+git clone https://github.com/your-user-name/cloudberry-devops-release.git
+```
+
+3. Add the upstream repo. (You only have to do this once, not every time.)
+
+```
+git remote add upstream https://github.com/apache/cloudberry-devops-release.git
+```
+
+4. Create a new branch to hold your work.
+
+```
+git checkout -b new-branch-name
+```
+
+5. Work on your new code.
+
+6. Commit your changes.
+
+```
+git add <the change files>
+git commit
+```
+
+7. Push your changes to your GitHub repo.
+
+```
+git push origin new-branch-name
+```
+
+8. Open a PR(Pull Request).
+
+Go to the repo on GitHub. There will be a message about your recently pushed
+branch, asking if you would like to open a pull request. Follow the prompts,
+compare across repositories, and submit the PR.
+
+9. Get your code reviewed.
+
+10. Congratulations! Once your PR is approved, then the code will be
+merged. Your code will be shipped in the recent future releases.
+
+## Sync your branch with the upstream
+
+Before working on your next contribution, make sure your local repository is
+up to date:
+
+```
+git checkout main
+git fetch upstream
+git rebase upstream/main
+```

README.md

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+# DevOps and Release for Apache Cloudberry (Incubating)