Merge branch 'gh-workflows'

PR #44.

* gh-workflows:
  Add additional maintenance github workflows

.github/workflows/label-comments.yaml

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+name: Labels workflow
+
+on:
+  pull_request:
+    types: [labeled]
+
+jobs:
+  comments-for-labels:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: 'write'
+    steps:
+      - name: Comment on labeled pull request
+        if: ${{ github.event.label.name == 'needs-tests' }}
+        uses: actions/github-script@v6
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const { owner, repo } = context.repo;
+            const { number, labels } = context.payload.pull_request;
+            const message = 'Thanks for the pull request! ' +
+              'Before we can merge this, we require tests to be added.  ' +
+              'This helps us maintain the quality of the codebase and ' +
+              'ensures we don\'t regress on this change in the future.  ' +
+              'See our contributing guidelines for ' +
+              'more details.  Let us know if you have any questions, and ' +
+              'thanks again for the pull request!';
+            await github.rest.issues.createComment({
+                owner, repo, issue_number: number, body: message});

.github/workflows/stale.yml

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+# This workflow warns and then closes issues and PRs that have had no activity for a specified amount of time.
+#
+# You can adjust the behavior by modifying this file.
+# For more information, see:
+# https://github.com/actions/stale
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+  - cron: '32 9 * * *'
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+
+    steps:
+    - uses: actions/stale@v5
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'This issue is still waiting on a response, and will be closed soon if there is no response.'
+        stale-pr-message: 'This PR is still waiting on updates and will be closed soon if there is no update.'
+        stale-issue-label: 'closing-soon-if-no-response'
+        stale-pr-label: 'closing-soon-if-no-response'
+        days-before-stale: 7
+        days-before-close: 2
+        days-before-pr-stale: 30
+        days-before-pr-close: 7
+        any-of-labels: response-needed,changes-requested

CONTRIBUTING.md

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+# Contributing
+
+We work hard to provide a high-quality and useful CLI, and we greatly value
+feedback and contributions from our community. Whether it's a new feature,
+correction, or additional documentation, we welcome your pull requests. Please
+submit any [issues](https://github.com/jmespath/jp/issues)
+or [pull requests](https://github.com/jmespath/jp/pulls)
+through GitHub.
+
+This document contains guidelines for contributing code and filing issues.
+
+## Contributing Code
+
+This list below are guidelines to use when submitting pull requests.
+These are the same set of guidelines that the core contributors use
+when submitting changes, and we ask the same of all community
+contributions as well:
+
+* We maintain a high percentage of code coverage in our tests.  As a general
+  rule of thumb, code changes should not lower the overall code coverage
+  percentage for the project. In practice, this means that every bug fix and
+  feature addition should include tests.
+* All PRs must run cleanly through `make test`.
+  in more detail in the sections below.
+
+
+## Feature Development
+
+This CLI is designed to be a reference CLI implementation of JMESPath,
+and implements the official JMESPath specification.  As such, we do not
+accept feature requests that are not part of the official JMESPath
+specification.  If you would like to propose changes to the JMESPath
+language itself, which includes new syntax, functions, operators, etc.,
+you can create a JMESPath enhancement proposal in the
+[jmespath.jep repository](https://github.com/jmespath/jmespath.jep).
+Once the proposal is accepted, we can then implement the changes in this
+CLI.
+
+## Running Tests
+
+To run the tests, you can run `make test`.