chore(core): enhance github issue templates (#12572)

.github/ISSUE_TEMPLATE/bug.yml

@@ -1,5 +1,8 @@
 name: Bug report
-description: File a bug report
+description: Report a bug or unexpected behavior in the project
+
+labels: ["bug", "area/backend", "area/frontend"]
+
 body:
   - type: markdown
     attributes:
@@ -20,7 +23,3 @@ body:
         - Kestra Version: develop
     validations:
       required: false
-labels:
-  - bug
-  - area/backend
-  - area/frontend

.github/ISSUE_TEMPLATE/config.yml

@@ -1,4 +1,4 @@
 contact_links:
   - name: Chat
     url: https://kestra.io/slack
-    about: Chat with us on Slack.
+    about: Chat with us on Slack

.github/ISSUE_TEMPLATE/feature.yml

@@ -1,5 +1,8 @@
 name: Feature request
-description: Create a new feature request
+description: Suggest a new feature or improvement to enhance the project
+
+labels: ["enhancement", "area/backend", "area/frontend"]
+
 body:
   - type: textarea
     attributes:
@@ -7,7 +10,3 @@ body:
       placeholder: Tell us more about your feature request. Don't forget to give us a star! ⭐
     validations:
       required: true
-labels:
-  - enhancement
-  - area/backend
-  - area/frontend