docs: added Feature request template in yaml (#1470)

.github/ISSUE_TEMPLATE/feature_request.md

----
-name: Feature request
-about: Suggest an idea for this project
-title: ''
-labels: 'New feature'
-assignees: ''
-
----
-
-**Is your feature request related to a problem? Please describe.**
-A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
-
-**Describe the solution you'd like**
-A clear and concise description of what you want to happen.
-
-**Describe alternatives you've considered**
-A clear and concise description of any alternative solutions or features you've considered.
-
-**Additional context**
-Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/feature_request.yml

+name: Feature request
+description: Suggest an idea for this project
+labels: New feature
+body:
+- type: markdown
+  attributes:
+    value: |
+      Thanks for taking the time to request a feature for QuestDB!
+- type: textarea
+  attributes:
+    label: Is your feature request related to a problem?
+    description: A concise description of the problem you are facing or the motivation behind this feature request.
+    placeholder: |
+      I experienced difficulties with...
+  validations:
+    required: false
+- type: textarea
+  attributes:
+    label: Describe the solution you'd like.
+    description: A concise description of what you want to happen.
+    placeholder: |
+      I would like to have...
+  validations:
+    required: false
+- type: textarea
+  attributes:
+    label: Describe alternatives you've considered.
+    description: Is there another approach to solve the problem?
+  validations:
+    required: false
+- type: textarea
+  attributes:
+    label: Additional context.
+    description: |
+      Add any other context, screenshots, links to provide more context about the feature request.
+  validations:
+    required: false