[Merged by Bors] - Initial listener-operator implementation

.dockerignore

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+debug/
+target/
+**/*.rs.bk
+
+.idea/
+*.iws
+
+image.tar
+
+# We do NOT want to ignore .git because we use the `built` crate to gather the current git commit hash at built time
+# This means we need the .git directory in our Docker image, it will be thrown away and won't be included in the final image

.flake8

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+[flake8]
+ignore = E111,E501,E114

.github/ISSUE_TEMPLATE/bug_report.yml

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+---
+name: "🐛 Bug Report"
+description: "If something isn't working as expected 🤔."
+labels: ["type/bug"]
+body:
+  - type: markdown
+    attributes:
+      value: Thanks for taking the time to file a bug report! Please fill out this form as completely as possible.
+
+  - type: input
+    attributes:
+      label: Affected version
+      description: Which version do you see this bug in?
+
+  - type: textarea
+    attributes:
+      label: Current and expected behavior
+      description: A clear and concise description of what the operator is doing and what you would expect.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Possible solution
+      description: "If you have suggestions on a fix for the bug."
+
+  - type: textarea
+    attributes:
+      label: Additional context
+      description: "Add any other context about the problem here. Or a screenshot if applicable."
+
+  - type: textarea
+    attributes:
+      label: Environment
+      description: |
+        What type of kubernetes cluster you are running aginst (k3s/eks/aks/gke/other) and any other information about your environment?
+      placeholder: |
+        Examples:
+        Output of `kubectl version --short`
+
+  - type: dropdown
+    attributes:
+      label: Would you like to work on fixing this bug?
+      description: |
+        **NOTE**: Let us know if you would like to submit a PR for this. We are more than happy to help you through the process.
+      options:
+        - "yes"
+        - "no"
+        - "maybe"

.github/ISSUE_TEMPLATE/config.yml

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+---
+blank_issues_enabled: true
+contact_links:
+  - name: Feature request
+    about: 🚀 Suggest an idea for this project
+    url: https://github.com/stackabletech/listener-operator/discussions/new?category=ideas
+  - name: 🙋🏾 Question
+    about: Use this to ask a question about this project
+    url: https://github.com/stackabletech/listener-operator/discussions/new?category=q-a
+  - name: Other issue
+    about: Open an issue that doesn't fit any other category
+    url: https://github.com/stackabletech/listener-operator/issues/new

.github/ISSUE_TEMPLATE/new_version.md

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+---
+name: New Version
+about: Request support for a new product version
+title: "[NEW VERSION]"
+labels: ''
+assignees: ''
+
+---
+
+**Which new version of Stackable Listener Operator should we support?**
+
+Please specify the version, version range or version numbers to support, please also add these to the issue title
+
+**Additional information**
+
+If possible, provide a link to release notes/changelog
+
+**Changes required**
+
+Are there any upstream changes that we need to support?
+e.g. new features, changed features, deprecated features etc.
+
+
+
+**Implementation checklist**
+
+Please don't change anything in this list.
+Not all of these steps are necessary for all versions.
+
+- [ ] Update the Docker image
+- [ ] Update documentation to include supported version(s)
+- [ ] Update operator to support the new version (if needed)
+- [ ] Update integration tests to test use the new versions (in addition or replacing old versions
+- [ ] Update examples to use new versions

.github/pull_request_template.md

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+
+# Description
+
+*Please add a description here. This will become the commit message of the merge request later.*
+
+<!-- Commit message above. Everything below is not added to the message. Do not change this line! -->
+
+## Review Checklist
+
+- [ ] Code contains useful comments
+- [ ] CRD change approved (or not applicable)
+- [ ] (Integration-)Test cases added (or not applicable)
+- [ ] Documentation added (or not applicable)
+- [ ] Changelog updated (or not applicable)
+- [ ] Cargo.toml only contains references to git tags (not specific commits or branches)
+- [ ] Helm chart can be installed and deployed operator works (or not applicable)
+
+Once the review is done, comment `bors r+` (or `bors merge`) to merge. [Further information](https://bors.tech/documentation/getting-started/#reviewing-pull-requests)