chore: add issue-templates for bug-reports & feature-requests (#284)

* chore: add bug report issue template

* chore: add feature request issue template

.github/ISSUE_TEMPLATE/1-bug-report.yaml

@@ -0,0 +1,36 @@
+name: Bug Report
+description: File a bug report.
+title: "[Bug]: "
+labels: ["bug", "triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: What happened?
+      description: Also tell us, what did you expect to happen?
+      placeholder: Tell us what you see!
+      value: "A bug happened!"
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Version
+      description: What version of next-themes are you using?
+    validations:
+      required: true
+  - type: dropdown
+    id: browsers
+    attributes:
+      label: What browsers are you seeing the problem on?
+      multiple: true
+      options:
+        - Firefox
+        - Chrome
+        - Safari
+        - Microsoft Edge
+        - other (please specify in the description)

.github/ISSUE_TEMPLATE/2-feature-request.yaml

@@ -0,0 +1,17 @@
+name: Feature request
+description: Feature request for next-themes.
+title: "[Feature request]: "
+labels: ["request"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this feature request!
+  - type: textarea
+    id: functionality
+    attributes:
+      label: What feature would you like to see?
+      description: Specify the feature you would like to see and perhaps what problem it would solve for you.
+      placeholder: "I would like to be able to..."
+    validations:
+      required: true