Improve GitHub issue templates

[ci skip]

Author: SailReal

.github/ISSUE_TEMPLATE/bug.md

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+name: Bug Report
+description: Create a report to help us improve
+labels: ["type:bug"]
+body:
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Please agree to the following
+      options:
+      - label: I have searched [existing issues](https://github.com/cryptomator/android/issues?q=) for duplicates
+        required: true
+      - label: I agree to follow this project's [Code of Conduct](https://github.com/cryptomator/android/blob/develop/.github/CODE_OF_CONDUCT.md)
+        required: true
+  - type: input
+    id: summary
+    attributes:
+      label: Summary
+      placeholder: Please summarize your problem.
+    validations:
+      required: true
+  - type: textarea
+    id: software-versions
+    attributes:
+      label: System Setup
+      description: |
+        What software is involved? Please provide version numbers as well.
+      value: |
+          - Android: [Version shown in the settings of Android"]
+          - Cryptomator: [Version shown in the settings of Cryptomator]
+          - …
+      render: markdown
+    validations:
+      required: true
+  - type: dropdown
+    id: cloud-type
+    attributes:
+      label: Cloud Type
+      description: Where is your vault located?
+      multiple: true
+      options:
+        - Dropbox
+        - Google Drive
+        - OneDrive
+        - WebDAV
+        - pCloud
+        - S3
+        - Local storage
+    validations:
+      required: false
+  - type: textarea
+    id: reproduction-steps
+    attributes:
+      label: Steps to Reproduce
+      value: |
+          1. [First Step]
+          2. [Second Step]
+          3. …
+    validations:
+      required: true
+  - type: textarea
+    id: expected-behaviour
+    attributes:
+      label: Expected Behavior
+      placeholder: What you expect to happen.
+    validations:
+      required: true
+  - type: textarea
+    id: actual-behaviour
+    attributes:
+      label: Actual Behavior
+      placeholder: What actually happens.
+    validations:
+      required: true
+  - type: dropdown
+    id: reproducibility
+    attributes:
+      label: Reproducibility
+      description: How often does the described behaviour occur?
+      options:
+        - Always
+        - Intermittent
+        - Only once
+    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.
+      render: shell
+  - type: textarea
+    id: further-info
+    attributes:
+      label: Anything else?
+      description: Links? References? Screenshots? Configurations? Any data that might be necessary to reproduce the issue?

.github/ISSUE_TEMPLATE/bug.yml

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+name: Feature Request
+description: Suggest an idea for this project
+labels: ["type:feature-request"]
+body:
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: Please agree to the following
+      options:
+      - label: I have searched [existing issues](https://github.com/cryptomator/android/issues?q=) for duplicates
+        required: true
+      - label: I agree to follow this project's [Code of Conduct](https://github.com/cryptomator/android/blob/develop/.github/CODE_OF_CONDUCT.md)
+        required: true
+  - type: input
+    id: summary
+    attributes:
+      label: Summary
+      placeholder: Please summarize your feature request.
+    validations:
+      required: true
+  - type: textarea
+    id: motivation
+    attributes:
+      label: Motivation
+      description: Who requires this feature? What problem does the user face? How would this feature solve the problem?
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Considered Alternatives
+      description: What current alternatives or workarounds have you considered? Is there a different way to solve the same problem?
+  - type: textarea
+    id: context
+    attributes:
+      label: Anything else?
+      description: Any context, suggestions, screenshots, or concepts you want to share?