chore: create bug/feature/PR template, configure template chooser

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/other_issue_report.md

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+---
+name: Other issue report
+about: Report other issue
+title: ''
+labels: bug
+assignees: ''
+---
+
+## Describe your issue
+
+## Further context
+
+<!-- If helpful please provide screenshots, logs, links to other related issues. -->

.github/ISSUE_TEMPLATE/stale_issue_report.md

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+---
+name: Stale issue report
+about: Report issues with using the stale action
+title: ''
+labels: bug
+assignees: ''
+---
+
+<!-- Have you tried the [debugging](https://github.com/actions/stale#debugging) section of the readme? -->
+
+## Describe your issue
+
+## Your stale action configuration
+
+<!-- This is an example config, please copy/paste your config into it. -->
+
+```yml
+jobs:
+  stale:
+    runs-on: ...
+    steps:
+      - uses: actions/stale@...
+        with:
+          ...
+```
+
+## Further context
+
+<!-- If helpful please provide screenshots, logs, links to other related issues. -->

.github/pull_request_template.md

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+<!-- List the change(s) you're making with this PR. -->
+## Changes
+- [x] ...
+
+## Context
+
+<!-- Explain why you're making the change(s). -->
+<!-- If you're closing an issue with this PR, [link them with a keyword](https://docs.github.com/en/github/managing-your-work-on-github/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword). -->