Refactor issue forms and add pull request template

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -1,20 +1,23 @@
-name: "\U00002728 Feature request"
+name: ✨ Feature request
 description: Request a new feature.
 labels: [enhancement]
+
 body:
 - type: markdown
   attributes:
     value: |
-      Important:
+      🧐 **Guidelines:**
 
-      - Please check existing issues (both opened and closed) to ensure that this feature hasn't been requested before.
-      - Refer to the [contribution guidelines](https://github.com/Tyrrrz/DiscordChatExporter/blob/master/Contributing.md) for info on how to file a good issue.
+      - Search through [existing issues](https://github.com/Tyrrrz/DiscordChatExporter/issues?q=is%3Aissue) first to ensure that this feature has not been requested before.
+      - Write a descriptive title for your issue. Avoid generic or vague titles such as "Some suggestions" or "Ideas for improvement".
+      - Keep your issue focused on one single problem. If you have multiple feature requests, please create separate issues for each of them.
+      - Provide as much context as possible in the details section. Include screenshots, screen recordings, links, references, or anything else you may consider relevant.
       - If you want to ask a question instead of requesting a feature, please use [discussions](https://github.com/Tyrrrz/DiscordChatExporter/discussions/new) instead.
 
 - type: dropdown
   attributes:
     label: Flavor
-    description: "Which flavor(s) of DiscordChatExporter does this feature request apply to? If this feature is not related to any specific flavor, leave this blank."
+    description: "Is this feature request related to specific flavor(s) of DiscordChatExporter? If not applicable, leave this field blank."
     multiple: true
     options:
     - GUI (Graphical User Interface)
@@ -23,7 +26,7 @@ body:
 - type: dropdown
   attributes:
     label: Export format
-    description: "Which export format(s) does this feature request apply to? If this feature is not related to any specific export format, leave this blank."
+    description: "Is this feature request related to specific export format(s)? If not applicable, leave this field blank."
     multiple: true
     options:
     - HTML
@@ -34,6 +37,6 @@ body:
 - type: textarea
   attributes:
     label: Details
-    description: "Clear and thorough explanation of the feature you have in mind. If relevant, include screenshots or screen recordings."
+    description: "Clear and thorough explanation of the feature you have in mind."
   validations:
     required: true