chore: import upstream snapshot with attribution

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug Report
+description: File a bug report
+title: "[Bug]: "
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: Steps to reproduce
+      description: What happened and how to reproduce it?
+      placeholder: Tell us what you see! 
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant log output
+      description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.
+      placeholder: Tell us what you see! It would be nice if you could leave us the logs.
+      render: text
+    validations:
+      required: true
+  - type: textarea
+    id: what-did-you-expect
+    attributes:
+      label: What did you expect to happen?
+      description: Also tell us, what did you expect to happen?
+      placeholder: Describe your expectations.
+    validations:
+      required: true
+  - type: input
+    id: pathway_version
+    attributes:
+      label: Version
+      description: On which version of the Pathway Live Data Framework are you working?
+    validations:
+      required: true
+  - type: input
+    id: docker_version
+    attributes:
+      label: Docker Versions (if used)
+      description: On which Docker version are you working?
+    validations:
+      required: false
+  - type: dropdown
+    id: os_version
+    attributes:
+      label: OS
+      description: On which OS did you run the Pathway Live Data Framework?
+      options:
+        - Linux
+        - MacOS
+    validations:
+      required: true
+  - type: dropdown
+    id: cpu_architecture
+    attributes:
+      label: On which CPU architecture did you run the Pathway Live Data Framework?
+      multiple: false
+      options:
+        - x86-64
+        - ARM64 (AArch64, Apple silicon)

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: New feature? Tell us about it on GitHub Discussions
+    url: https://github.com/pathwaycom/pathway/discussions
+    about: We are using Discussions as a place to connect with other members of the Pathway community.
+  - name: Discord
+    url: https://discord.com/invite/pathway
+    about: Ask questions you are wondering about.

.github/pull_request_template.md

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+### Introduction
+To contribute code to the Pathway Live Data Framework project, start by discussing your proposed changes on Discord or by filing an issue. 
+Once approved, follow the fork + pull request model against the main branch, ensuring you've signed the contributor license agreement.
+
+### Context
+<!--- Why is this change required? What problem does it solve? -->
+
+### How has this been tested?
+<!--- Please describe in detail how you tested your changes. -->
+
+### Types of changes
+<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature or improvement (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+
+### Related issue(s):
+1. 
+2.
+3.
+
+### Checklist:
+<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
+<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
+- [ ] My code follows the code style of this project,
+- [ ] My change requires a change to the documentation,
+- [ ] I described the modification in the CHANGELOG.md file.

.github/workflows/python-lint.yml

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+name: lint PR
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main'}}
+jobs:
+  linter:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+    - name: Git checkout
+      uses: actions/checkout@v3
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.11
+    - name: Install poetry
+      uses: abatilo/actions-poetry@v3
+    - name: Install linters
+      run: poetry install --no-root --only linters
+    - name: Run black
+      run: poetry run black --check .
+    - name: Run Flake8
+      run: poetry run flake8 .
+    - name: Run mypy
+      run: poetry run mypy .
+    - name: Run isort
+      run: poetry run isort --check .