chore: import upstream snapshot with attribution

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Something isn't working as expected
+labels: bug
+---
+
+## What happened
+
+<!-- A clear description of the bug. -->
+
+## Steps to reproduce
+
+1.
+
+## Expected behavior
+
+## Screenshots / video
+
+## Environment
+
+- cliamp version (`cliamp --version`):
+- OS:
+- Audio backend (PipeWire / PulseAudio / ALSA):
+- Provider(s) involved:

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea or improvement
+labels: enhancement
+---
+
+## Problem
+
+<!-- What's missing or painful today? -->
+
+## Proposal
+
+<!-- What you'd like to see. -->
+
+## Mockups / references