feat(GitHub): add issue template (#1264)

Author: JellyBrick

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug Report
+description: Report a YouTube Music bug
+title: "[Bug]: "
+labels: "bug :beetle:"
+body:
+- type: checkboxes
+  attributes:
+    label: Preflight Checklist
+    description: Please ensure you've completed all of the following.
+    options:
+      - label: I use the latest version of YouTube Music (Application).
+        required: true
+      - label: I have searched the [issue tracker](https://github.com/th-ch/youtube-music/issues) for a bug report that matches the one I want to file, without success.
+        required: true
+- type: input
+  attributes:
+    label: YouTube Music (Application) Version
+    description: |
+      What version of YouTube Music Application are you using?
+
+      Note: Please check if this issue is reproducible with the latest stable release.
+    placeholder: 2.0.0
+  validations:
+    required: true
+- type: dropdown
+  attributes:
+    label: What operating system are you using?
+    options:
+      - Windows
+      - macOS
+      - Ubuntu
+      - Other Linux
+      - Other (specify below)
+  validations:
+    required: true
+- type: input
+  attributes:
+    label: Operating System Version
+    description: What operating system version are you using? On Windows, click Start button > Settings > System > About. On macOS, click the Apple Menu > About This Mac. On Linux, use lsb_release or uname -a.
+    placeholder: "e.g. Windows 10 version 1909, macOS Catalina 10.15.7, or Ubuntu 20.04"
+  validations:
+    required: true
+- type: dropdown
+  attributes:
+    label: What arch are you using?
+    options:
+      - x64
+      - ia32
+      - arm64 (including Apple Silicon)
+      - Other (specify below)
+  validations:
+    required: true
+- type: input
+  attributes:
+    label: Last Known Working YouTube Music (Application) version
+    description: (If applicable) What is the last version of YouTube Music this worked in?
+    placeholder: 1.20.0
+- type: textarea
+  attributes:
+    label: Expected Behavior
+    description: A clear and concise description of what you expected to happen. (Add a replication step if applicable)
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Actual Behavior
+    description: A clear description of what actually happens.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Additional Information
+    description: If your problem needs further explanation, or if the issue you're seeing cannot be reproduced in a gist, please add more information here. 

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature Request
+description: Suggest an idea for YouTube Music
+title: "[Feature Request]: "
+labels: "enhancement :sparkles:"
+body:
+- type: checkboxes
+  attributes:
+    label: Preflight Checklist
+    description: Please ensure you've completed all of the following.
+    options:
+      - label: I use the latest version of YouTube Music (Application).
+        required: true
+      - label: I have searched the [issue tracker](https://github.com/th-ch/youtube-music/issues) for a feature request that matches the one I want to file, without success.
+        required: true
+- type: textarea
+  attributes:
+    label: Problem Description
+    description: Please add a clear and concise description of the problem you are seeking to solve with this feature request.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Proposed Solution
+    description: Describe the solution you'd like in a clear and concise manner.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Alternatives Considered
+    description: A clear and concise description of any alternative solutions or features you've considered.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Additional Information
+    description: Add any other context about the problem here.
+  validations:
+    required: false