feat: add GitHub Issue templates

Added templates for GitHub Issues to streamline bug reporting and
feature requests. The 'Report Bug' template includes fields for
description of the bug, expected behavior, actual behavior, affected
browsers, operating systems, steps to reproduce, and a checklist. The
'Feature Request' template includes fields for feature description,
use cases, and a checklist for issue submission.

.github/ISSUE_TEMPLATE/01-bug-report.yaml

@@ -0,0 +1,79 @@
+name: Report Bug
+description: Help us improve by reporting a bug
+labels: ['🐛 bug']
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: 📝 Description,
+      description: A clear and concise description of the bug.
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: 🎯 Expected Behavior,
+      description: A clear and concise description of what you expected to happen.
+      placeholder: e.g. It should export a JSON file when clicking the button.
+    validations:
+      required: true
+  - type: textarea
+    id: actual
+    attributes:
+      label: 🚫 Actual Behavior,
+      description: A clear and concise description of what actually happened.
+      placeholder: e.g. It just does not work when clicked.
+    validations:
+      required: true
+  - type: checkboxes
+    id: browsers
+    attributes:
+      label: Browser,
+      description: In which browser(s) are you experiencing the issue? You may select more than one.
+      options:
+        - label: Chrome/Chromium,
+        - label: Firefox,
+        - label: Safari,
+        - label: Edge,
+        - label: Opera,
+        - label: Kiwi,
+        - label: SPIN,
+        - label: Brave,
+        - label: Other/not relevant
+    validations:
+      required: true
+  - type: checkboxes
+    id: operating-systems
+    attributes:
+      label: Operating system,
+      description: In which operating systems are you experiencing the issue? You may select more than one.
+      options:
+        - label: Windows,
+        - label: Linux,
+        - label: macOS,
+        - label: iOS,
+        - label: Android,
+        - label: Other/not relevant
+    validations:
+      required: true
+  - type: textarea
+    id: stepsToReproduce
+    attributes:
+      label: Steps to reproduce,
+      description: Please provide a detailed guide on how this issue can be reproduced.
+      placeholder: |
+        1. I opened the modal by clicking the more button.
+        2. I clicked on the export JSON button.
+        ...
+    validations:
+      required: true
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: ✅ Checklist,
+      description: Please review the following checklist before submitting your issue.
+      options:
+        - label: I have searched if someone has submitted a similar issue before and there weren't any. (Please make sure to also search closed issues, as this issue might already have been resolved.)
+          required: true
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/02-feature-request.yaml

@@ -0,0 +1,30 @@
+name: Feature Request
+description: Share with us your ideas on how Quiz Manager could be improved upon.
+labels: ['✨ enhancement']
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Description,
+      description: Try to describe in detail the feature you wish existed.
+      placeholder: e.g. I want to be able to lock certain quizzes while editing.
+    validations:
+      required: true
+  - type: textarea
+    id: use-cases
+    attributes:
+      label: Use cases,
+      description: Why do you need this feature? Provide real-life use cases as to why this feature will be useful for others.
+      placeholder: e.g. Sometimes, I accidentally edit a quiz that is not intended for editing.
+    validations:
+      required: true
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: Checklist,
+      description: Please check the following items before submitting your issue.
+      options:
+        - label: I have searched the existing issues to make sure this bug has not already been reported.
+          required: true
+    validations:
+      required: true